CVE-2026-80636
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.
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
Description
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.
- CVSS
- Not yet scored
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/35e21a4dccc5c255ba59ccfbfeb4629ed21da972
- https://git.kernel.org/stable/c/61eab1d0237eb513fe73e391a5926ee70092c325
- https://git.kernel.org/stable/c/6bba4846f196d081bf553391d12b5a73dcc48685
- https://git.kernel.org/stable/c/a052a94bcc629acaecc2ce42a4af77f8fa399757
- https://git.kernel.org/stable/c/d53eecbca16f056abba274075cb15120ab062518
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.