{"id":"CVE-2026-80664","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_nat: reject unsupported target families\n\nxt_nat SNAT and DNAT target handlers assume IP-family conntrack state\nis present and can dereference a NULL point…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_nat: reject unsupported target families\n\nxt_nat SNAT and DNAT target handlers assume IP-family conntrack state\nis present and can dereference a NULL point…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H","cwe":["CWE-476"],"vendor":"Linux","product":"Linux","affected":["Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < 49abe564391411057a26a9a943c8e17867c3b9b4","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < 0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < 4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < a842dab87cab29f2a5798a47b2dc5e6a449950bf","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < e35c048d7511e9d4c2a537b8a231c49606e97c16","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < 679ced28a9dc2f6dc679eb05027d779693e60902","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < ec88fa71c82072e9189983b05b499d3507550271","Linux >= c7232c9979cba684c50b64c513c4a83c9aa70563 < 5d1a2240935ea47e2673d0ea17fdb058e4dc91dd","Linux 3.7"],"published":"2026-08-28","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:18:05.470","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80664","references":[{"url":"https://git.kernel.org/stable/c/0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/49abe564391411057a26a9a943c8e17867c3b9b4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5d1a2240935ea47e2673d0ea17fdb058e4dc91dd","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/679ced28a9dc2f6dc679eb05027d779693e60902","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a842dab87cab29f2a5798a47b2dc5e6a449950bf","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e35c048d7511e9d4c2a537b8a231c49606e97c16","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ec88fa71c82072e9189983b05b499d3507550271","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80664.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80664"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525374"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80664"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80664"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082846-CVE-2026-80664-664b@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00127,"epssPercentile":0.02399,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T19:19:29.866934Z"},"scores":{"nvd":7.3,"vendor":5.5},"ingestedAt":"2026-08-30T04:47:09.915Z","slug":"CVE-2026-80664","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_nat: reject unsupported target families\n\nxt_nat SNAT and DNAT target handlers assume IP-family conntrack state\nis present and can dereference a NULL pointer when instantiated from an\nunsupported family through nft_compat. A bridge-family compat rule can\ntherefore trigger a NULL-dereference in nf_nat_setup_info().\n\nReject non-IP families in xt_nat_checkentry() so unsupported targets\ncannot be installed. Keep NFPROTO_INET allowed for valid inet NAT\ncompat users and leave the runtime fast path unchanged.\n\n[ The crash was fixed via\n  9dbba7e694ec (\"netfilter: nft_compat: ebtables emulation must reject non-bridge targets\"),\n  so this patch is no longer critical.\n  Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra\n  family check is a good idea in any case. ]\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80664.json)","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}