386 lines
19 KiB
JSON
386 lines
19 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-21761",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-29T08:45:45.761Z",
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"datePublished": "2025-02-27T02:18:14.054Z",
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"dateUpdated": "2026-10-15T01:04:07.041Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:54:14.184Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nopenvswitch: use RCU protection in ovs_vport_cmd_fill_info()\n\novs_vport_cmd_fill_info() can be called without RTNL or RCU.\n\nUse RCU protection and dev_net_rcu() to avoid potential UAF."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is reached only through the openvswitch generic-netlink family (OVS_VPORT_CMD_NEW/SET/DEL) and through netdev namespace migration triggered by local syscalls; there is no remote or adjacent-network input path.\nAC:L - The attacker controls both sides of the race — it schedules the netns teardown (dropping the last reference to a namespace it created) and the `ovs_dp_notify_wq`/vport command that re-reads `dev_net(vport->dev)` — and can repeat the sequence indefinitely until the window is hit.\nPR:L - The vport commands use GENL_UNS_ADMIN_PERM, i.e. `netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)`, which any unprivileged user obtains via `unshare -Urn`; namespace creation and `ip link set ... netns` likewise need only namespaced capabilities, and the module auto-loads on family lookup.\nUI:N - The entire sequence — datapath creation, port attach, namespace move and teardown — is performed by the attacker's own processes with no action from any other user.\nS:U - The corruption and its consequences stay within the kernel's own security authority; no hypervisor, IOMMU, or other trust boundary is crossed.\nC:H - Use-after-free read of a freed `struct net`, plus `alloc_netid()` persists the dangling pointer into a live namespace's `netns_ids` IDR where the attacker can resurrect it via RTM_GETNSID/IFLA_TARGET_NETNSID/BPF `get_net_ns_by_id()`, yielding access to reallocated kernel memory and cross-namespace state.\nI:H - `maybe_get_net()` and `put_net()` perform atomic refcount increments/decrements directly on freed slab memory, corrupting whatever object reuses it, and a stale `struct net *` is durably written into a live namespace's IDR — a standard UAF write primitive leveragable for privilege escalation.\nA:H - Dereferencing and refcount-manipulating a freed `struct net` causes oops/panic, and a spurious `put_net()` can drive `__put_net()`/`cleanup_net()` over a destroyed or reused object, crashing the machine."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/openvswitch/datapath.c"
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],
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"versions": [
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "e85a25d1a9985645e796039e843d1de581d2de1e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "a8816b3f1f151373fd30f1996f00480126c8bb11",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "a884f57600e463f69d7b279c4598b865260b62a1",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "7e01abc34e87abd091e619161a20f54ed4e3e2da",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "8ec57509c36c8b9a23e50b7858dda0c520a2d074",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "a849a10de5e04d798f7f286a2f1ca174719a617a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "5828937742af74666192835d657095d95c53dbd0",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "9354d452034273a50a4fd703bea31e5d6b1fc20b",
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"lessThan": "90b2f49a502fa71090d9f4fe29a2f51fe5dff76d",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"net/openvswitch/datapath.c"
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],
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"versions": [
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{
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"version": "4.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.4.291",
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"lessThanOrEqual": "5.4.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.235",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.179",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.129",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.79",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.16",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13.4",
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"lessThanOrEqual": "6.13.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.14",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.15",
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"versionEndExcluding": "5.4.291"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e85a25d1a9985645e796039e843d1de581d2de1e"
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},
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{
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"url": "https://git.kernel.org/stable/c/a8816b3f1f151373fd30f1996f00480126c8bb11"
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},
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{
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"url": "https://git.kernel.org/stable/c/a884f57600e463f69d7b279c4598b865260b62a1"
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},
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{
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"url": "https://git.kernel.org/stable/c/7e01abc34e87abd091e619161a20f54ed4e3e2da"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ec57509c36c8b9a23e50b7858dda0c520a2d074"
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},
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{
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"url": "https://git.kernel.org/stable/c/a849a10de5e04d798f7f286a2f1ca174719a617a"
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},
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{
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"url": "https://git.kernel.org/stable/c/5828937742af74666192835d657095d95c53dbd0"
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},
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{
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"url": "https://git.kernel.org/stable/c/90b2f49a502fa71090d9f4fe29a2f51fe5dff76d"
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}
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],
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"title": "openvswitch: use RCU protection in ovs_vport_cmd_fill_info()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.8,
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"attackVector": "LOCAL",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"integrityImpact": "HIGH",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "LOW",
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"confidentialityImpact": "HIGH"
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}
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},
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2025-21761",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2025-02-27T17:57:35.920303Z"
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}
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}
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"type": "CWE",
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"cweId": "CWE-416",
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"description": "CWE-416 Use After Free"
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}
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]
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2025-02-27T18:02:27.210Z"
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}
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},
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
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},
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T19:37:08.745Z"
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}
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},
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{
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"x_adpType": "supplier",
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"providerMetadata": {
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"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:04:07.041Z"
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},
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"affected": [
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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},
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{
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"vendor": "Siemens",
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"product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThan": "*",
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"versionType": "custom"
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}
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],
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"defaultStatus": "unknown"
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}
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],
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"references": [
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
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},
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{
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"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
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}
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]
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}
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]
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}
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} |