Linux vulnerability

What happened

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 versions

Linux: fb1adb05ea87b6149e65a31e511756c4f470d0cd through before e13194e60217db02c2e7202375d9e5951267d87b (git); f123293db16dcd0cd81b246ae60e6362f0025d0a through before de6601f1374fab124cd9276df6671f64d940ceb4 (git); 3cb03edb4de33fd04c4ea55f47397b96a8657c53 through before 48cf7918d10c66cb6b05226fa3fa5daf0c891089 (git); 3cb03edb4de33fd04c4ea55f47397b96a8657c53 through before cd968dcdec6aee79a2d399e4f6e0eca63c3b45e1 (git); 3cb03edb4de33fd04c4ea55f47397b96a8657c53 through before 0cdc6d5a26f2d1f7f15a43526841b679445c32e2 (git); 3cb03edb4de33fd04c4ea55f47397b96a8657c53 through before 779c60a5190c42689534172f4b49e927c9959e4e (git); 6.1.107 through before 6.1.188 (semver); 6.6.48 through before 6.6.157 (semver); 6.7 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.