CVE-2026-45860
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conncount: increase the connection clean up limit to 64 After the optimization to only perform one GC per jiffy, a new problem was introduced. If more than 8 new connections are tracked per jiffy the list won't be cleaned up fast enough possibly reaching the limit wrongly. In order to prevent this issue, only skip the GC if it was already triggered during the same jiffy and the increment is lower than the clean up limit. In addition, increase the clean up limit to 64 connections to avoid triggering GC too often and do more effective GCs. This has been tested using a HTTP server and several performance tools while having nft_connlimit/xt_connlimit or OVS limit configured. Output of slowhttptest + OVS limit at 52000 connections: slow HTTP test status on 340th second: initializing: 0 pending: 432 connected: 51998 error: 0 closed: 0 service available: YES
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 6.1.170-1 |
| debian | forky | fixed | 6.18.14-1 |
| debian | sid | fixed | 6.18.14-1 |
| debian | trixie | fixed | 6.12.85-1 |
| sles | affected | | |
| debian | bullseye | fixed | 5.10.257-1 |
References
- https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966
- https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c
- https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79
- https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24
- https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff
- https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a
- https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db
- https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3
- https://security-tracker.debian.org/tracker/CVE-2026-45860
- https://www.suse.com/security/cve/CVE-2026-45860.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.