CVE-2026-80636
CVE CVE-2026-80636EUVD EUVD-2026-67512Published 2026-08-28T06:48:50.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: revert ct extension genid infrastructure This infrastructure is not used anymore after moving ct timeout and helper to use datapath refcount to track object use. Revert commit c56716c69ce1 ("netfilter: extensions: introduce extension genid count") this patch disables all ct extensions (leading to NULL) for unconfirmed conntracks, when this is only targeted at ct helper and ct timeout. There is also codebase that dereferences the ct extension without checking for NULL which could lead to crash.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux c56716c69ce1ac320432fb1ea5654196ba24d2f8 <d53eecbca16f056abba274075cb15120ab062518; patch: 0; c56716c69ce1ac320432fb1ea5654196ba24d2f8 <a052a94bcc629acaecc2ce42a4af77f8fa399757; 5.19; c56716c69ce1ac320432fb1ea5654196ba24d2f8 <6bba4846f196d081bf553391d12b5a73dcc48685; c56716c69ce1ac320432fb1ea5654196ba24d2f8 <61eab1d0237eb513fe73e391a5926ee70092c325; patch: 7.2; patch: 6.18.40; patch: 6.6.145; patch: 6.12.97; c56716c69ce1ac320432fb1ea5654196ba24d2f8 <35e21a4dccc5c255ba59ccfbfeb4629ed21da972; patch: 7.1.5
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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