CVE-2025-38004
Linux Kernel CAN bcm KASAN Slab-Out-of-Bounds Read
Description
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.
INFO
Published Date :
June 8, 2025, 11:15 a.m.
Last Modified :
June 9, 2025, 12:15 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
Exploitability Score :
References to Advisories, Solutions, and Tools
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CVE-2025-38004.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2025-38004 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-38004 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 08, 2025
Action Type Old Value New Value Added Description 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. Added Reference https://git.kernel.org/stable/c/2a437b86ac5a9893c902f30ef66815bf13587bf6 Added Reference https://git.kernel.org/stable/c/7595de7bc56e0e52b74e56c90f7e247bf626d628 Added Reference https://git.kernel.org/stable/c/76c84c3728178b2d38d5604e399dfe8b0752645e Added Reference https://git.kernel.org/stable/c/8f1c022541bf5a923c8d6fa483112c15250f30a4 Added Reference https://git.kernel.org/stable/c/c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 Added Reference https://git.kernel.org/stable/c/c4e8a172501e677ebd8ea9d9161d97dc4df56fbd Added Reference https://git.kernel.org/stable/c/cc55dd28c20a6611e30596019b3b2f636819a4c0 Added Reference https://git.kernel.org/stable/c/fbd8fdc2b218e979cfe422b139b8f74c12419d1f
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-38004 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-38004
weaknesses.