🛡️ AZL-63687 — kernel (CVE-2025-38004)

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2025-38004 affecting package kernel for versions less than 6.6.96.1-1

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 bcm_can_tx().

Anderson Nascimento created a proof of concept that triggered a KASAN

slab-out-of-bounds read access which can be prevented with a spin_lock_bh.

At the rework of bcm_can_tx() the 'count' variable has been moved into

the protected section as this variable can be modified from both contexts

too.

Affected software

AZL-63687 is recorded against 1 package.

  • kernel (fixed in 6.6.96.1-1)

Timeline and source

Published on 8 June 2025 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2025-06-08
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel — 6.6.96.1-1

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