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-2025-21763",
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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": "2025-02-27T02:18:15.078Z",
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"dateUpdated": "2026-10-15T01:04:09.650Z"
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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": "2026-08-05T11:54:16.348Z"
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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\nneighbour: use RCU protection in __neigh_notify()\n\n__neigh_notify() can be called without RTNL or RCU protection.\n\nUse RCU protection 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 decisive side of the race — `dev_net_set()` during netdevice namespace migration or `default_device_exit_batch()` on netns teardown, followed by freeing the `struct net` — is driven only by local syscalls (`unshare(CLONE_NEWNET|CLONE_NEWUSER)`, RTM_NEWLINK/RTM_SETLINK). A purely remote or adjacent peer can generate ARP/NDISC traffic to reach `__neigh_notify()` but cannot cause the namespace pointer to go stale.\nAC:L - The attacker controls both sides: they spin a loop creating/destroying network namespaces with veth devices while concurrently driving neighbour add/update/GC notifications on other CPUs, so the race is created rather than waited for. Per race-condition guidance, attacker-created races are Low even though the window between the `dev_net()` load and the `net->rtnl` dereference is narrow.\nPR:L - `unshare -Urn` grants namespace-relative CAP_NET_ADMIN (`ns_capable(net->user_ns, CAP_NET_ADMIN)`), letting an ordinary unprivileged user create netns, create and move veth pairs, and trigger the teardown path; no real root is needed. Neighbour-table activity that reaches `__neigh_notify()` is likewise available to any unprivileged process.\nUI:N - The attacker triggers both the namespace teardown and the neighbour notifications entirely from their own processes. No victim action, mount, or file open is involved.\nS:U - The use-after-free and its consequences are confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed. This is standard in-kernel corruption leading to local privilege escalation.\nC:H - The freed `struct net` is a reclaimable `net_cachep` slab object, and `net->rtnl` is subsequently consumed as a `struct sock *` by `netlink_set_err()`/`nlmsg_notify()`, which read `sk->sk_protocol` and `sock_net(sk)` and walk netlink tables from it. Heap-spraying the freed object turns this into an attacker-directed kernel read primitive.\nI:H - With the freed `struct net` reclaimed under attacker control, `netlink_set_err()` writes through the forged `sk` pointer (`sk->sk_err = err`, list/waitqueue manipulation), giving a controlled kernel write usable for control-flow hijacking. Per guidance, use-after-free is scored High for integrity.\nA:H - Even without successful reclaim, dereferencing the freed `struct net` and the dangling `net->rtnl` socket causes a kernel oops or panic in `nlmsg_notify()`/`netlink_set_err()`. The trigger loop can be repeated indefinitely by an unprivileged user."
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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/core/neighbour.c"
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],
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"versions": [
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{
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"version": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32",
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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": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "8666e9aab801328c1408a19fbf4070609dc0695a",
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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": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "40d8f2f2a373b6c294ffac394d2bb814b572ead1",
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"status": "affected",
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"versionType": "git"
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{
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"version": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "784eb2376270e086f7db136d154b8404edacf97b",
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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": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379",
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"status": "affected",
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"versionType": "git"
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{
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"lessThan": "cdd5c2a12ddad8a77ce1838ff9f29aa587de82df",
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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": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "559307d25235e24b5424778c7332451b6c741159",
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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": "426b5303eb435d98b9bee37a807be386bc2b3320",
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"lessThan": "becbd5850c03ed33b232083dd66c6e38c0c0e569",
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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/core/neighbour.c"
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],
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"versions": [
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{
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"version": "2.6.25",
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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": "2.6.25",
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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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"operator": "OR",
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"url": "https://git.kernel.org/stable/c/e1aed6be381bcd7f46d4ca9d7ef0f5f3d6a1be32"
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},
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{
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"url": "https://git.kernel.org/stable/c/8666e9aab801328c1408a19fbf4070609dc0695a"
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},
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{
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"url": "https://git.kernel.org/stable/c/40d8f2f2a373b6c294ffac394d2bb814b572ead1"
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},
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{
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"url": "https://git.kernel.org/stable/c/784eb2376270e086f7db136d154b8404edacf97b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1cbb2aa90cd3fba15ad7efb5cdda28f3d1082379"
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},
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{
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{
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"url": "https://git.kernel.org/stable/c/559307d25235e24b5424778c7332451b6c741159"
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{
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"url": "https://git.kernel.org/stable/c/becbd5850c03ed33b232083dd66c6e38c0c0e569"
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}
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],
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"title": "neighbour: use RCU protection in __neigh_notify()",
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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-2025-21763",
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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": "2025-02-27T17:57:24.552153Z"
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}
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}
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],
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"problemTypes": [
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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": "2025-02-27T18:02:26.961Z"
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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": "2025-11-03T19:37:14.329Z"
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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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"shortName": "siemens-SADP",
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"dateUpdated": "2026-10-15T01:04:09.650Z"
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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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"versions": [
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{
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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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} |