462 lines
22 KiB
JSON
462 lines
22 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-2026-52912",
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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": "2026-06-09T07:44:35.366Z",
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"datePublished": "2026-06-24T07:14:10.583Z",
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"dateUpdated": "2026-11-10T12:47:41.976Z"
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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": "2026-08-05T12:31:35.846Z"
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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\nnetfilter: nf_queue: hold bridge skb->dev while queued\n\nbr_pass_frame_up() rewrites skb->dev from the ingress port to the bridge\nmaster before queueing bridge LOCAL_IN packets. NFQUEUE only holds\nreferences on state.in/out and bridge physdevs, so a queued bridge\npacket can retain a freed bridge master in skb->dev until reinjection.\n\nWhen the verdict is reinjected later, br_netif_receive_skb() re-enters\nthe receive path with skb->dev still pointing at the freed bridge master,\ntriggering a use-after-free.\n\nStore skb->dev in the queue entry, hold a reference on it for the queue\nlifetime, and use the saved device when dropping queued packets during\nNETDEV_DOWN handling."
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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 - Exploitation requires local control of netfilter/NFQUEUE, bridge device lifecycle, and verdict reinjection through netlink/rtnetlink paths. Remote packets alone cannot force the needed bridge teardown and userspace verdict sequence.\nAC:L - A local attacker can deterministically create a namespace, bridge/veth setup, NFQUEUE rule, queued packet, bridge teardown, and reinjection. There is no race dependent on conditions outside attacker control.\nPR:L - The setup requires CAP_NET_ADMIN, but netfilter and bridge configuration are reachable with CAP_NET_ADMIN inside a user-created network namespace on systems allowing unprivileged user namespaces. This is Low, not High.\nUI:N - No victim action is required once the local attacker runs the exploit sequence. The attacker controls packet injection, queueing, device teardown, and verdict delivery.\nS:U - The impact is kernel memory corruption within the same host security authority. This is a standard local kernel privilege escalation/DoS scenario, not a VM or hardware boundary escape.\nC:H - The bug is a use-after-free of the bridge master net_device retained in skb->dev across NFQUEUE. Kernel UAFs can be leveraged for kernel memory disclosure, so confidentiality impact is High.\nI:H - The stale net_device pointer is dereferenced after free in the receive path and can plausibly be combined with heap reclaim/spraying for memory corruption or control-flow impact. As a kernel UAF, integrity impact is High.\nA:H - At minimum, reinjection can dereference freed net_device memory in netif_receive_skb and crash/oops the kernel. Repeated local triggering makes availability impact High."
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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/netfilter/nf_queue.h",
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"net/netfilter/nf_queue.c",
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"net/netfilter/nfnetlink_queue.c"
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],
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"include/net/netfilter/nf_queue.h",
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"net/netfilter/nf_queue.c",
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"net/netfilter/nfnetlink_queue.c"
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],
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"status": "unaffected",
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},
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},
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{
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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": "6.18.34",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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},
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"version": "7.0.11",
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"lessThanOrEqual": "7.0.*",
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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": "7.1",
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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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"cpeApplicability": [
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{
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"operator": "OR",
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"url": "https://git.kernel.org/stable/c/19924bdd8a45ebc72a7b84c57fd63057d1dc75ac"
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"url": "https://git.kernel.org/stable/c/1e5e20031c5eee8d2e490a90ff4d6a2feecfc3be"
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{
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"url": "https://git.kernel.org/stable/c/e196115ec330a18de415bdb9f5071aa9f08e53ce"
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}
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],
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"title": "netfilter: nf_queue: hold bridge skb->dev while queued",
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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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"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": "2026-11-10T12:47:41.976Z"
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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 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)",
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"versions": [
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{
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"versions": [
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}
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"versions": [
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{
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"metrics": [
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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-2026-52912",
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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": "2026-10-16T15:22:30.377062Z"
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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": "2026-10-19T19:36:59.798Z"
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}
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}
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]
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}
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} |