Description
In the Linux kernel, the following vulnerability has been resolved:
netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
Sashiko pointed out that there are a few lockless RCU readers using test_bit() which is a relaxed atomic operation and provides no memory barrier guarantees. Use test_bit_acquire() instead where the operation may run parallel with add/del/gc, i.e. is not one from the next cases
- protected by region lock - in a set destroy phase - in a new/temporary set creation phase
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < c107233d2ff4fd7cef5d02f9124b99194957a710; >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 6329d3a9afe715fddda0460cfa46b496d61c2fe0; >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 7445fe965b7d8756070a40e80f8b73348ccda1d7; >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < c4d257734e91bfcdc71d41843392dd6400b5bb1b; >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < 3219d74e4536658c937fd878a327257b86ce80dd; >= 18f84d41d34fa35d0d64bbaea01fe664553ecc06, < e4b4984e28c16406ecb318444dea4a8bf47def3e |
| Linux | Linux | 4.2 |
References
- https://git.kernel.org/stable/c/3219d74e4536658c937fd878a327257b86ce80dd
- https://git.kernel.org/stable/c/6329d3a9afe715fddda0460cfa46b496d61c2fe0
- https://git.kernel.org/stable/c/7445fe965b7d8756070a40e80f8b73348ccda1d7
- https://git.kernel.org/stable/c/c107233d2ff4fd7cef5d02f9124b99194957a710
- https://git.kernel.org/stable/c/c4d257734e91bfcdc71d41843392dd6400b5bb1b
- https://git.kernel.org/stable/c/e4b4984e28c16406ecb318444dea4a8bf47def3e
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 16, 2026
- NVD status
- Received