CVEvulnerability
CVE-2026-72436
9.8 CRITICAL
Official page ↗
- Status
- Received
- Published
- 2026-08-15
- Last modified
- 2026-10-16
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
References
- https://git.kernel.org/stable/c/3219d74e4536658c937fd878a327257b86ce80dd git.kernel.org
- https://git.kernel.org/stable/c/6329d3a9afe715fddda0460cfa46b496d61c2fe0 git.kernel.org
- https://git.kernel.org/stable/c/7445fe965b7d8756070a40e80f8b73348ccda1d7 git.kernel.org
- https://git.kernel.org/stable/c/c107233d2ff4fd7cef5d02f9124b99194957a710 git.kernel.org
- https://git.kernel.org/stable/c/c4d257734e91bfcdc71d41843392dd6400b5bb1b git.kernel.org
- https://git.kernel.org/stable/c/e4b4984e28c16406ecb318444dea4a8bf47def3e git.kernel.org