AZL-63687
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-63687.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-63687
- Upstream
- Published
- 2025-06-08T11:15:22Z
- Modified
- 2026-04-01T05:20:47.546155Z
- Summary
- CVE-2025-38004 affecting package kernel for versions less than 6.6.96.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
can: bcm: add locking for bcm_op runtime updates
The CAN broadcast manager (CAN BCM) can send a sequence of CAN frames via hrtimer. The content and also the length of the sequence can be changed resp reduced at runtime where the 'currframe' counter is then set to zero.
Although this appeared to be a safe operation the updates of 'currframe' can be triggered from user space and hrtimer context in bcmcantx(). Anderson Nascimento created a proof of concept that triggered a KASAN slab-out-of-bounds read access which can be prevented with a spinlockbh.
At the rework of bcmcantx() the 'count' variable has been moved into the protected section as this variable can be modified from both contexts too.
- References