161 lines
8.3 KiB
JSON
161 lines
8.3 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-2026-43454",
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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": "2026-05-01T14:12:56.010Z",
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"datePublished": "2026-05-08T14:22:18.719Z",
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"dateUpdated": "2026-08-05T12:28:02.179Z"
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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": "2026-08-05T12:28:02.179Z"
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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 for duplicate device in netdev hooks\n\nWhen handling NETDEV_REGISTER notification, duplicate device\nregistration must be avoided since the device may have been added by\nnft_netdev_hook_alloc() already when creating the hook."
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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 vulnerable nf_tables netdev hook path is reached through local NETLINK_NETFILTER/nfnetlink configuration messages and local netdevice lifecycle operations, not by remote packets alone.\nAC:L - The attacker can create/update nftables netdev hooks and create/unregister matching devices from controlled local threads; any race/timing involved is attacker-controlled and repeatable.\nPR:L - nfnetlink requires CAP_NET_ADMIN over the target network namespace, but nftables/netfilter and netdevice operations are reachable by an unprivileged local user via user and network namespaces on affected deployments.\nUI:N - No victim action is required after the attacker has local execution; the attacker sends netlink requests and triggers device unregister/release paths directly.\nS:U - The bug corrupts kernel/netfilter state within the same kernel security authority; it is a standard local kernel privilege escalation/DoS class issue, not a VM or sandbox boundary change.\nC:H - The flaw leaves stale nf_hook_ops entries referencing a freed net_device, producing a use-after-free; per kernel scoring guidance, UAF conditions are treated as capable of high confidentiality impact.\nI:H - The stale hook/device pointer can be driven through unregister paths after attacker-controlled freeing and heap reuse, making this a kernel UAF with potential write/control-flow exploitation.\nA:H - The syzbot report shows a KASAN use-after-free in nf_hook_entry_head during hook unregister, and the condition can crash/oops the kernel."
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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/netfilter/nf_tables_api.c",
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"net/netfilter/nft_chain_filter.c"
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],
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"versions": [
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{
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"version": "a331b78a552551d0e404e58e6390b1c828d6af8f",
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"lessThan": "6d2a95c6890577cc3eab2b20018e16850d7fb094",
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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": "a331b78a552551d0e404e58e6390b1c828d6af8f",
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"lessThan": "2041cdb078041611510fc189410bc70b29f688fb",
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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": "a331b78a552551d0e404e58e6390b1c828d6af8f",
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"lessThan": "b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b",
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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/netfilter/nf_tables_api.c",
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"net/netfilter/nft_chain_filter.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.19",
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"lessThanOrEqual": "6.18.*",
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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": "6.19.9",
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"lessThanOrEqual": "6.19.*",
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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": "7.0",
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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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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.18.19"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "6.19.9"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.16",
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"versionEndExcluding": "7.0"
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}
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]
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}
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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://git.kernel.org/stable/c/6d2a95c6890577cc3eab2b20018e16850d7fb094"
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},
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{
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"url": "https://git.kernel.org/stable/c/2041cdb078041611510fc189410bc70b29f688fb"
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},
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{
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"url": "https://git.kernel.org/stable/c/b7cdc5a97d02c943f4bdde4d5767ad0c13cad92b"
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}
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],
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"title": "netfilter: nf_tables: Fix for duplicate device in netdev hooks",
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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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} |