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 products
linux: linux kernel
References6
- git.kernel.org/stable/c/0cdc6d5a26f2d1f7f15a43526841b679445c32e2 Patch
- git.kernel.org/stable/c/779c60a5190c42689534172f4b49e927c9959e4e Patch
- git.kernel.org/stable/c/48cf7918d10c66cb6b05226fa3fa5daf0c891089
- git.kernel.org/stable/c/cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1
- git.kernel.org/stable/c/de6601f1374fab124cd9276df6671f64d940ceb4
- git.kernel.org/stable/c/e13194e60217db02c2e7202375d9e5951267d87b
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 5 · as of 14 November 2026
Could this be exploited in your environment?
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