{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43329", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.002Z", "datePublished": "2026-05-08T13:31:17.479Z", "dateUpdated": "2026-05-08T13:31:17.479Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-08T13:31:17.479Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: strictly check for maximum number of actions\n\nThe maximum number of flowtable hardware offload actions in IPv6 is:\n\n* ethernet mangling (4 payload actions, 2 for each ethernet address)\n* SNAT (4 payload actions)\n* DNAT (4 payload actions)\n* Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing)\n for QinQ.\n* Redirect (1 action)\n\nWhich makes 17, while the maximum is 16. But act_ct supports for tunnels\nactions too. Note that payload action operates at 32-bit word level, so\nmangling an IPv6 address takes 4 payload actions.\n\nUpdate flow_action_entry_next() calls to check for the maximum number of\nsupported actions.\n\nWhile at it, rise the maximum number of actions per flow from 16 to 24\nso this works fine with IPv6 setups."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_flow_table_offload.c"], "versions": [{"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "ead66c77303f760f6c30be96e2e20d5a77cef614", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "fe9018d3e94329f1951b00805a8640bc06f56ead", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "5382bb03e9c33b089d60788478b922a2dca284cc", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "57c78bd2e2dd08897acd35b2bf8bcef322e36f5e", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "504c9456699dcf4d15195ef34a0fa94a80bfc877", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "879959a7a2be814dd57568655eafa3d8f4d0309e", "status": "affected", "versionType": "git"}, {"version": "c29f74e0df7a02b8303bcdce93a7c0132d62577a", "lessThan": "76522fcdbc3a02b568f5d957f7e66fc194abb893", "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/nf_flow_table_offload.c"], "versions": [{"version": "5.5", "status": "affected"}, {"version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "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": "5.5", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ead66c77303f760f6c30be96e2e20d5a77cef614"}, {"url": "https://git.kernel.org/stable/c/fe9018d3e94329f1951b00805a8640bc06f56ead"}, {"url": "https://git.kernel.org/stable/c/5382bb03e9c33b089d60788478b922a2dca284cc"}, {"url": "https://git.kernel.org/stable/c/57c78bd2e2dd08897acd35b2bf8bcef322e36f5e"}, {"url": "https://git.kernel.org/stable/c/504c9456699dcf4d15195ef34a0fa94a80bfc877"}, {"url": "https://git.kernel.org/stable/c/879959a7a2be814dd57568655eafa3d8f4d0309e"}, {"url": "https://git.kernel.org/stable/c/76522fcdbc3a02b568f5d957f7e66fc194abb893"}], "title": "netfilter: flowtable: strictly check for maximum number of actions", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: flowtable: strictly check for maximum number of actions\n\nThe maximum number of flowtable hardware offload actions in IPv6 is:\n\n* ethernet mangling (4 payload actions, 2 for each ethernet address)\n* SNAT (4 payload actions)\n* DNAT (4 payload actions)\n* Double VLAN (4 vlan actions, 2 for popping vlan, and 2 for pushing)\n for QinQ.\n* Redirect (1 action)\n\nWhich makes 17, while the maximum is 16. But act_ct supports for tunnels\nactions too. Note that payload action operates at 32-bit word level, so\nmangling an IPv6 address takes 4 payload actions.\n\nUpdate flow_action_entry_next() calls to check for the maximum number of\nsupported actions.\n\nWhile at it, rise the maximum number of actions per flow from 16 to 24\nso this works fine with IPv6 setups."}], "id": "CVE-2026-43329", "lastModified": "2026-05-08T14:16:42.520", "metrics": {}, "published": "2026-05-08T14:16:42.520", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/504c9456699dcf4d15195ef34a0fa94a80bfc877"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5382bb03e9c33b089d60788478b922a2dca284cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/57c78bd2e2dd08897acd35b2bf8bcef322e36f5e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/76522fcdbc3a02b568f5d957f7e66fc194abb893"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/879959a7a2be814dd57568655eafa3d8f4d0309e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ead66c77303f760f6c30be96e2e20d5a77cef614"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe9018d3e94329f1951b00805a8640bc06f56ead"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}