CVE-2026-45860netfilter: nf_conncount: increase the connection clean up limit to 64
- 7.5HighCVSS base score
- 0.74%Exploitation in 30 daysEPSS · top 45% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.74% · top 45% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
- affected f106694733c66a48740c25bc4e212e9b2ea364ce – < a5c9e14e0e8923218ae881d5e78c990c07694966
- affected be69850b461e7b491d87a22e33ab76fdd04b725e – < 13eede458fdf231f1bf96a398feea4ad1553f14c
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < fa85432d58c8e74b39333edbf8d28df2985dfc79
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < 0792ad077d776c2dcf20f0484e2461ded1b77a24
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < 3d0994ed0aa1fc0a2c5e620b765e8defdd021bff
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < 6e5fa7add3e76da068a478d905be64be8fa4e80a
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < 0af0812baf2d363176c9b76fc07e33f13aede8db
- affected d265929930e2ffafc744c0ae05fb70acd53be1ee – < 21d033e472735ecec677f1ae46d6740b5e47a4f3
- affected 5.10.248 – < 5.10.252
- affected 5.15.198 – < 5.15.202
- affected 5.19
- unaffected < 5.19
- unaffected 5.10.252 – ≤ 5.10.*
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/a5c9e14e0e8923218ae881d5e78c990c07694966 (opens in a new tab)
- https://git.kernel.org/stable/c/13eede458fdf231f1bf96a398feea4ad1553f14c (opens in a new tab)
- https://git.kernel.org/stable/c/fa85432d58c8e74b39333edbf8d28df2985dfc79 (opens in a new tab)
- https://git.kernel.org/stable/c/0792ad077d776c2dcf20f0484e2461ded1b77a24 (opens in a new tab)
- https://git.kernel.org/stable/c/3d0994ed0aa1fc0a2c5e620b765e8defdd021bff (opens in a new tab)
- https://git.kernel.org/stable/c/6e5fa7add3e76da068a478d905be64be8fa4e80a (opens in a new tab)
- https://git.kernel.org/stable/c/0af0812baf2d363176c9b76fc07e33f13aede8db (opens in a new tab)
- https://git.kernel.org/stable/c/21d033e472735ecec677f1ae46d6740b5e47a4f3 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32326 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45860)Record last updated .