{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43060", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.981Z", "datePublished": "2026-05-05T15:17:26.393Z", "dateUpdated": "2026-08-05T12:25:39.251Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:39.251Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_ct: drop pending enqueued packets on removal\n\nPackets sitting in nfqueue might hold a reference to:\n\n- templates that specify the conntrack zone, because a percpu area is\n used and module removal is possible.\n- conntrack timeout policies and helper, where object removal leave\n a stale reference.\n\nSince these objects can just go away, drop enqueued packets to avoid\nstale reference to them.\n\nIf there is a need for finer grain removal, this logic can be revisited\nto make selective packet drop upon dependencies." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached through local NETLINK_NETFILTER/nftables and NFQUEUE configuration plus verdict reinjection, not directly by unauthenticated network packets.\nAC:L - The attacker can deterministically create the nft ct timeout/helper/zone rule, queue packets, remove the referenced object, and reinject the queued packet; no uncontrollable race is required.\nPR:L - nfnetlink requires CAP_NET_ADMIN over the target network namespace, and nftables/netfilter administration is reachable by an unprivileged user via user and network namespaces where enabled.\nUI:N - Exploitation does not require victim interaction after the attacker has local execution; the attacker drives the netlink operations, packet queueing, object removal, and verdicts.\nS:U - The stale reference corrupts or dereferences kernel/netfilter objects within the same kernel security authority; this is a standard local kernel privilege escalation scope.\nC:H - This is a use-after-free/stale-reference condition involving freed nft ct timeout/helper/template objects retained by queued packets, which can be leveraged for kernel memory disclosure.\nI:H - Use-after-free of kernel heap objects and stale helper/function-bearing references can be shaped with heap reuse to gain write/control-flow primitives, so high integrity impact is defensible.\nA:H - At minimum, reinjecting queued packets after object removal can dereference freed kernel memory and crash or oops the kernel." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nft_ct.c" ], "versions": [ { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "8a64e76933672b08bd85b63086f33432070fd729", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "3da0b946835f33bf36b459ead764c61a761e689b", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "ab50302190b303f847c4eba0e31a01a56dec596e", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "e68a8db3a0546482b34e9ca5ca886bcf73eb37bb", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "6802ff8beceb9c4254318e81c1395720438f2cc2", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "f29a055e4f593e577805b41228b142b58f48df1b", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "77da55dee67720e2b8d2db49a53334e6c017ee7b", "status": "affected", "versionType": "git" }, { "version": "7e0b2b57f01d183e1c84114f1f2287737358d748", "lessThan": "36eae0956f659e48d5366d9b083d9417f3263ddc", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/netfilter/nft_ct.c" ], "versions": [ { "version": "4.19", "status": "affected" }, { "version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.78" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.20" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.19.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/8a64e76933672b08bd85b63086f33432070fd729" }, { "url": "https://git.kernel.org/stable/c/3da0b946835f33bf36b459ead764c61a761e689b" }, { "url": "https://git.kernel.org/stable/c/ab50302190b303f847c4eba0e31a01a56dec596e" }, { "url": "https://git.kernel.org/stable/c/e68a8db3a0546482b34e9ca5ca886bcf73eb37bb" }, { "url": "https://git.kernel.org/stable/c/6802ff8beceb9c4254318e81c1395720438f2cc2" }, { "url": "https://git.kernel.org/stable/c/f29a055e4f593e577805b41228b142b58f48df1b" }, { "url": "https://git.kernel.org/stable/c/77da55dee67720e2b8d2db49a53334e6c017ee7b" }, { "url": "https://git.kernel.org/stable/c/36eae0956f659e48d5366d9b083d9417f3263ddc" } ], "title": "netfilter: nft_ct: drop pending enqueued packets on removal", "x_generator": { "engine": "bippy-1.2.0" } } } }