CVE-2026-45897netfilter: nft_counter: serialize reset with spinlock
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% 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: nft_counter: serialize reset with spinlock Add a global static spinlock to serialize counter fetch+reset operations, preventing concurrent dump-and-reset from underrunning values. The lock is taken before fetching the total so that two parallel resets cannot both read the same counter values and then both subtract them. A global lock is used for simplicity since resets are infrequent. If this becomes a bottleneck, it can be replaced with a per-net lock later.
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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected fb1adb05ea87b6149e65a31e511756c4f470d0cd – < e13194e60217db02c2e7202375d9e5951267d87b
- affected f123293db16dcd0cd81b246ae60e6362f0025d0a – < de6601f1374fab124cd9276df6671f64d940ceb4
- affected 3cb03edb4de33fd04c4ea55f47397b96a8657c53 – < 48cf7918d10c66cb6b05226fa3fa5daf0c891089
- affected 3cb03edb4de33fd04c4ea55f47397b96a8657c53 – < cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1
- affected 3cb03edb4de33fd04c4ea55f47397b96a8657c53 – < 0cdc6d5a26f2d1f7f15a43526841b679445c32e2
- affected 3cb03edb4de33fd04c4ea55f47397b96a8657c53 – < 779c60a5190c42689534172f4b49e927c9959e4e
- affected 6.1.107 – < 6.1.188
- affected 6.6.48 – < 6.6.157
- affected 6.7
- unaffected < 6.7
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.101 – ≤ 6.12.*
- unaffected 6.18.42 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References6
- https://git.kernel.org/stable/c/e13194e60217db02c2e7202375d9e5951267d87b (opens in a new tab)
- https://git.kernel.org/stable/c/de6601f1374fab124cd9276df6671f64d940ceb4 (opens in a new tab)
- https://git.kernel.org/stable/c/48cf7918d10c66cb6b05226fa3fa5daf0c891089 (opens in a new tab)
- https://git.kernel.org/stable/c/cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1 (opens in a new tab)
- https://git.kernel.org/stable/c/0cdc6d5a26f2d1f7f15a43526841b679445c32e2 (opens in a new tab)
- https://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e (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-2026-32363 (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-2026-45897)Record last updated .