CVEvulnerability
CVE-2026-45897
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-05-27
- Last modified
- 2026-09-14
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
Affected configurations
• linux linux kernel (>= 6.1.107 < 6.2)
• linux linux kernel (>= 6.6.48 < 6.19.4)
References
- https://git.kernel.org/stable/c/0cdc6d5a26f2d1f7f15a43526841b679445c32e2 Patch
- https://git.kernel.org/stable/c/48cf7918d10c66cb6b05226fa3fa5daf0c891089 git.kernel.org
- https://git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e Patch
- https://git.kernel.org/stable/c/cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1 git.kernel.org
- https://git.kernel.org/stable/c/de6601f1374fab124cd9276df6671f64d940ceb4 git.kernel.org
- https://git.kernel.org/stable/c/e13194e60217db02c2e7202375d9e5951267d87b git.kernel.org