232 lines
12 KiB
JSON
232 lines
12 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-2023-54035",
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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": "2025-12-24T10:53:46.180Z",
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"datePublished": "2025-12-24T10:56:02.358Z",
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"dateUpdated": "2026-08-05T09:16:39.727Z"
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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": "2026-08-05T09:16:39.727Z"
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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_tables: fix underflow in chain reference counter\n\nSet element addition error path decrements reference counter on chains\ntwice: once on element release and again via nft_data_release().\n\nThen, d6b478666ffa (\"netfilter: nf_tables: fix underflow in object\nreference counter\") incorrectly fixed this by removing the stateful\nobject reference count decrement.\n\nRestore the stateful object decrement as in b91d90368837 (\"netfilter:\nnf_tables: fix leaking object reference count\") and let\nnft_data_release() decrement the chain reference counter, so this is\ndone only once."
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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 vulnerability is reached via the nfnetlink/netlink socket interface (NFT_MSG_NEWSETELEM), a local kernel API with no remote/network reachability.\nAC:L - The attacker deterministically reaches the buggy error path (e.g., inserting a duplicate map element to force -EEXIST) and controls how many times to repeat it; no uncontrolled conditions are involved.\nPR:L - nf_tables requires CAP_NET_ADMIN, but an unprivileged user obtains this in a new network namespace via unshare -Urn, so only low privileges are needed.\nUI:N - The counter underflow and subsequent chain deletion are triggered entirely by the attacker's own netlink operations, with no victim interaction required.\nS:U - The impact stays within the kernel's security authority (local privilege escalation), not crossing into a separate security scope such as a hypervisor boundary.\nC:H - The chain refcount underflow leads to a use-after-free of the chain object, letting the attacker reclaim the freed slot and read sensitive kernel memory.\nI:H - The use-after-free provides heap write primitives via reclaiming the freed chain object, enabling arbitrary memory corruption and privilege escalation.\nA:H - Freeing a still-referenced chain leaves dangling pointers that cause use-after-free access and kernel panic/oops."
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}
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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": "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/netfilter/nf_tables_api.c"
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],
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"versions": [
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{
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"lessThan": "b068314fd8ce751a7f906e55bb90f3551815f1a0",
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"status": "affected",
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},
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"lessThan": "9c959671abc7d4ffdf34eed10c64492d43cb6a3c",
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"status": "affected",
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},
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{
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"status": "affected",
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},
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},
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"status": "affected",
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{
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"version": "a136b7942ad2a50de708f76ea299ccb45ac7a7f9",
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"status": "affected",
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"versionType": "git"
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},
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"status": "affected",
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},
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{
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"version": "d60be2da67d172aecf866302c91ea11533eca4d9",
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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": "dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41",
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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": "4.19.316",
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"lessThan": "4.20",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.4.262",
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"lessThan": "5.5",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.10.188",
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"lessThan": "5.11",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "5.15.121",
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"lessThan": "5.16",
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"status": "affected",
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"versionType": "semver"
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},
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{
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"version": "6.3.10",
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"lessThan": "6.4",
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"status": "affected",
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"versionType": "semver"
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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/netfilter/nf_tables_api.c"
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],
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{
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"version": "6.4",
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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": "6.4",
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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": "6.4.4",
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"lessThanOrEqual": "6.4.*",
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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": "6.5",
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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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"cpeApplicability": [
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b068314fd8ce751a7f906e55bb90f3551815f1a0"
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},
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{
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"url": "https://git.kernel.org/stable/c/9c959671abc7d4ffdf34eed10c64492d43cb6a3c"
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{
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"url": "https://git.kernel.org/stable/c/b389139f12f287b8ed2e2628b72df89a081f0b59"
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}
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],
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"title": "netfilter: nf_tables: fix underflow in chain reference counter",
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