IT

Tracker / CVE-2025-38004

CVE-2025-38004

High 7.3

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 products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 2.6.25 → 5.4.294
linux linux_kernel · 5.11 → 5.15.185
linux linux_kernel · 5.16 → 6.1.141
linux linux_kernel · 5.5 → 5.10.238
linux linux_kernel · 6.13 → 6.14.9
linux linux_kernel · 6.2 → 6.6.93
linux linux_kernel · 6.7 → 6.12.31

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References