CVE-2026-80664netfilter: xt_nat: reject unsupported target families
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nat: reject unsupported target families xt_nat SNAT and DNAT target handlers assume IP-family conntrack state is present and can dereference a NULL pointer when instantiated from an unsupported family through nft_compat. A bridge-family compat rule can therefore trigger a NULL-dereference in nf_nat_setup_info(). Reject non-IP families in xt_nat_checkentry() so unsupported targets cannot be installed. Keep NFPROTO_INET allowed for valid inet NAT compat users and leave the runtime fast path unchanged. [ The crash was fixed via 9dbba7e694ec ("netfilter: nft_compat: ebtables emulation must reject non-bridge targets"), so this patch is no longer critical. Nevertheless, NAT is only relevant for ipv4/ipv6, so this extra family check is a good idea in any case. ]
- CVSS
- 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c7232c9979cba684c50b64c513c4a83c9aa70563 before 49abe564391411057a26a9a943c8e17867c3b9b4; from c7232c9979cba684c50b64c513c4a83c9aa70563 before 0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82; from c7232c9979cba684c50b64c513c4a83c9aa70563 before 4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777; from c7232c9979cba684c50b64c513c4a83c9aa70563 before a842dab87cab29f2a5798a47b2dc5e6a449950bf; from c7232c9979cba684c50b64c513c4a83c9aa70563 before e35c048d7511e9d4c2a537b8a231c49606e97c16; from c7232c9979cba684c50b64c513c4a83c9aa70563 before 679ced28a9dc2f6dc679eb05027d779693e60902; from c7232c9979cba684c50b64c513c4a83c9aa70563 before ec88fa71c82072e9189983b05b499d3507550271; from c7232c9979cba684c50b64c513c4a83c9aa70563 before 5d1a2240935ea47e2673d0ea17fdb058e4dc91dd | CNA record |
References
- https://git.kernel.org/stable/c/49abe564391411057a26a9a943c8e17867c3b9b4
- https://git.kernel.org/stable/c/0afc9ad987c0faa80ab5f8d6e7815085ac8dbb82
- https://git.kernel.org/stable/c/4fbc2bac02edabb665beb2aa87ca6f1e1d4c4777
- https://git.kernel.org/stable/c/a842dab87cab29f2a5798a47b2dc5e6a449950bf
- https://git.kernel.org/stable/c/e35c048d7511e9d4c2a537b8a231c49606e97c16
- https://git.kernel.org/stable/c/679ced28a9dc2f6dc679eb05027d779693e60902
- https://git.kernel.org/stable/c/ec88fa71c82072e9189983b05b499d3507550271
- https://git.kernel.org/stable/c/5d1a2240935ea47e2673d0ea17fdb058e4dc91dd
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.