VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-53001: Linux kernel · netfilter: xtables: restrict several matches to inet family

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9, cbeb259f31382de70a70a59ffd0e66f5e80d9818, b6fe26f86a1649f84e057f3f15605b08eda15497 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9	Fixed in fa88161ef56e29bdaa05cc89dbc4ee221e94bfe9
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < cbeb259f31382de70a70a59ffd0e66f5e80d9818	Fixed in cbeb259f31382de70a70a59ffd0e66f5e80d9818
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < b6fe26f86a1649f84e057f3f15605b08eda15497	Fixed in b6fe26f86a1649f84e057f3f15605b08eda15497
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 76160e04440c9698b989dbd9492a7ec4f520c9ee	Fixed in 76160e04440c9698b989dbd9492a7ec4f520c9ee
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 14203f9edf944b3fb63faadd62f38452421ecdfc	Fixed in 14203f9edf944b3fb63faadd62f38452421ecdfc
LinuxLinux	Affected ≥ ab4f21e6fb1c09b13c4c3cb8357babe8223471bd, < 689a91ff18d6448d94c1ab7c076fecdb2b668bef	Fixed in 689a91ff18d6448d94c1ab7c076fecdb2b668bef

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: restrict several matches to inet family This is a partial revert of: commit ab4f21e6fb1c ("netfilter: xtables: use NFPROTO_UNSPEC in more extensions") to allow ipv4 and ipv6 only. - xt_mac - xt_owner - xt_physdev These extensions are not used by ebtables in userspace. Moreover, xt_realm is only for ipv4, since dst->tclassid is ipv4 specific.

References

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