🛡️ CVE-2025-38004 — debian-linux

🟠 CVSS 7.3 — High ✅ No Known Exploit CWE-125 NVD
7.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

can: bcm: add locking for bcm_op runtime updates

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability high.

Weakness class

CVE-2025-38004 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2025-38004 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.13.0 up to 6.14.9)
  • linux-kernel

Timeline and source

Published on 8 June 2025 and last revised on 30 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org
lists.debian.org

CVE-2025-38004 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity HIGH
CVSS Score 7.3
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2025-06-08
Updated 2026-08-12
Modified 2026-07-30

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.13.0 6.14.9
linux-kernel — —

References

Similar Threats

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