370 lines
18 KiB
JSON
370 lines
18 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-2025-21791",
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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": "2024-12-29T08:45:45.766Z",
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"datePublished": "2025-02-27T02:18:29.014Z",
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"dateUpdated": "2026-10-15T01:04:25.820Z"
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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": "2026-08-05T11:54:28.163Z"
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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\nvrf: use RCU protection in l3mdev_l3_out()\n\nl3mdev_l3_out() can be called without RCU being held:\n\nraw_sendmsg()\n ip_push_pending_frames()\n ip_send_skb()\n ip_local_out()\n __ip_local_out()\n l3mdev_ip_out()\n\nAdd rcu_read_lock() / rcu_read_unlock() pair to avoid\na 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 - Both halves of the race are driven from the local system — a `sendmsg()` on a local socket for the read side, and RTNL link operations (VRF delete/unenslave) for the free side. A remote peer cannot induce the VRF teardown that arms the use-after-free.\nAC:L - The attacker controls both sides of the race and can loop them indefinitely: one thread sends UDP/raw packets out a VRF-enslaved device while another repeatedly unenslaves/deletes the VRF master, with preemption pressure raised at will. `do_vrf_del_slave()` widens the window further by unlinking the adjacency before clearing `IFF_L3MDEV_SLAVE`.\nPR:L - The transmit side needs no privileges at all (ordinary UDP sendmsg), and the VRF create/enslave/delete side needs only CAP_NET_ADMIN within a network namespace, which an unprivileged user obtains via `unshare -Urn`.\nUI:N - The attacker's own threads perform every step — socket sends and netlink link operations — with no victim action required.\nS:U - The use-after-free and its consequences are confined to the kernel's own security authority; no VM, IOMMU, or other trust boundary is crossed.\nC:H - The freed `netdev_adjacent` sits in a general kmalloc cache and is readily groomed, letting the attacker supply `upper->dev`, after which `master->l3mdev_ops` and `->l3mdev_l3_out` are read from an attacker-chosen address — an arbitrary kernel read primitive.\nI:H - The same reclaimed object yields an indirect call through an attacker-controlled function pointer with `master` as the first argument, giving control-flow hijack and thus arbitrary kernel-state modification.\nA:H - Even unweaponized, dereferencing a stale adjacency entry and calling through garbage function pointers reliably oopses or panics the kernel, and the attacker can retrigger it at will."
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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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"include/net/l3mdev.h"
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],
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"versions": [
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{
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"version": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "20a3489b396764cc9376e32a9172bee26a89dc3b",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "5bb4228c32261d06e4fbece37ec3828bcc005b6b",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "c7574740be8ce68a57d0aece24987b9be2114c3c",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "c40cb5c03e37552d6eff963187109e2c3f78ef6f",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "022cac1c693add610ae76ede03adf4d9d5a2cf21",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "7b81425b517accefd46bee854d94954f5c57e019",
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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": "a8e3e1a9f02094145580ea7920c6a1d9aabd5539",
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"lessThan": "6d0ce46a93135d96b7fa075a94a88fe0da8e8773",
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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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"include/net/l3mdev.h"
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],
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"versions": [
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{
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"version": "4.9",
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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": "4.9",
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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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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.9",
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"versionEndExcluding": "5.4.291"
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"references": [
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"url": "https://git.kernel.org/stable/c/6ccaa5797f5362a2aad6baa6ddaf4715ac2dd51e"
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},
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{
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"url": "https://git.kernel.org/stable/c/20a3489b396764cc9376e32a9172bee26a89dc3b"
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},
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{
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"url": "https://git.kernel.org/stable/c/5bb4228c32261d06e4fbece37ec3828bcc005b6b"
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},
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{
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"url": "https://git.kernel.org/stable/c/c7574740be8ce68a57d0aece24987b9be2114c3c"
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},
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{
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"url": "https://git.kernel.org/stable/c/c40cb5c03e37552d6eff963187109e2c3f78ef6f"
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},
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{
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"url": "https://git.kernel.org/stable/c/022cac1c693add610ae76ede03adf4d9d5a2cf21"
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},
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{
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"url": "https://git.kernel.org/stable/c/7b81425b517accefd46bee854d94954f5c57e019"
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{
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"url": "https://git.kernel.org/stable/c/6d0ce46a93135d96b7fa075a94a88fe0da8e8773"
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}
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],
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"title": "vrf: use RCU protection in l3mdev_l3_out()",
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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-2025-21791",
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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": "2025-02-27T17:57:16.236835Z"
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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": "2025-02-27T18:02:26.723Z"
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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": "2025-11-03T20:59:34.647Z"
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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": "2026-10-15T01:04:25.820Z"
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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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"references": [
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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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} |