AZL-88893
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-88893.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-88893
- Upstream
- Published
- 2026-05-28T10:16:38Z
- Modified
- 2026-08-28T17:48:09.983597374Z
- Summary
- CVE-2026-46233 affecting package kernel for versions less than 6.6.141.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
batman-adv: bla: only purge non-released claims
When batadvblapurgeclaims() goes through the list of claims, it is only traversing the hash list with an rcureadlock(). Due to a potential parallel batadvclaimput(), it can happen that it encounters a claim which was actually in the process of being released+freed by batadvclaimrelease(). In this case, backbonegw is set to NULL before the delayed RCU kfree is started. Calling batadvblaclaimgetbackbone_gw() is then no longer allowed because it would cause a NULL-ptr derefence.
To avoid this, only claims with a valid reference counter must be purged. All others are already taken care of.
- References