CVE-2025-38004

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Source
https://cve.org/CVERecord?id=CVE-2025-38004
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38004.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38004
Downstream
Related
Published
2025-06-08T10:34:56.484Z
Modified
2026-03-20T12:42:37.161122Z
Summary
can: bcm: add locking for bcm_op runtime updates
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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38004.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
ffd980f976e7fd666c2e61bf8ab35107efd11828
Fixed
8f1c022541bf5a923c8d6fa483112c15250f30a4
Fixed
7595de7bc56e0e52b74e56c90f7e247bf626d628
Fixed
fbd8fdc2b218e979cfe422b139b8f74c12419d1f
Fixed
2a437b86ac5a9893c902f30ef66815bf13587bf6
Fixed
76c84c3728178b2d38d5604e399dfe8b0752645e
Fixed
cc55dd28c20a6611e30596019b3b2f636819a4c0
Fixed
c4e8a172501e677ebd8ea9d9161d97dc4df56fbd
Fixed
c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38004.json"