CVE-2026-72436
- Source
- https://cve.org/CVERecord?id=CVE-2026-72436
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72436.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-72436
- Downstream
- Published
- 2026-08-15T05:56:50Z
- Modified
- 2026-08-18T03:56:55Z
- Severity
-
- 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- netfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
- Details
-
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
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72436.json" }- 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
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72436.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-72436
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced18f84d41d34fa35d0d64bbaea01fe664553ecc06Fixedc107233d2ff4fd7cef5d02f9124b99194957a710Fixed6329d3a9afe715fddda0460cfa46b496d61c2fe0Fixed7445fe965b7d8756070a40e80f8b73348ccda1d7Fixedc4d257734e91bfcdc71d41843392dd6400b5bb1bFixed3219d74e4536658c937fd878a327257b86ce80ddFixede4b4984e28c16406ecb318444dea4a8bf47def3e
Linux / Kernel
Package
- Name
- Kernel