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.
CVE-2025-38004
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38004
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "8f1c022541bf5a923c8d6fa483112c15250f30a4",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "7595de7bc56e0e52b74e56c90f7e247bf626d628",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "fbd8fdc2b218e979cfe422b139b8f74c12419d1f",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "2a437b86ac5a9893c902f30ef66815bf13587bf6",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "76c84c3728178b2d38d5604e399dfe8b0752645e",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "cc55dd28c20a6611e30596019b3b2f636819a4c0",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "c4e8a172501e677ebd8ea9d9161d97dc4df56fbd",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7",
"versionType": "git"
}
],
"programFiles": [
"net/can/bcm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.25"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.25",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.294",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.238",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.185",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.141",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.93",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.31",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.9",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/can/bcm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38004
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30508 · Revision 1
- Added to Heist Feed
- Publisher date