can: bcm: add missing device refcount for CAN filter removal
In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing device refcount for CAN filter removal sashiko-bot remarked a problem with a concurrent device unregistration in isotp.c which also is present in the bcm.c code. A former fix for raw.c commit c275a176e4b6 ("can: raw: add missing refcount for memory leak fix") introduced a netdevice_tracker which solves the issue for bcm.c too. bcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on dev_get_by_index(ifindex) to re-find the device for an rx_op before unregistering its filter. If a concurrent NETDEV_UNREGISTER has already unlisted the device from the ifindex table, that lookup fails and can_rx_unregister() is silently skipped, leaving a stale CAN filter pointing at the soon-to-be-freed bcm_op/socket. Hold a netdev_hold()/netdev_put() tracked reference on op->rx_reg_dev from the moment the rx filter is registered in bcm_rx_setup() until it is unregistered in bcm_rx_unreg(), and use that reference directly in bcm_release() and bcm_delete_rx_op() instead of re-looking the device up by ifindex.
CVE-2026-72113
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-2026-72113
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": "bd5232663524e94cc5aad861dca11e3db8e2ab6f",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "ee8b36d0faca08f35b889b6e9aa850695e5b8ba9",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "dcaee869913c7210cd47ed0a8f27349d7bdcdb7b",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "84aa4807816e405c1bf87114fc63e06d244281ef",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "633bda66fbf309f5de5e1ad6defe8e6b1d77a20f",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "b024c21c9066f6957b7d4a8f2037e4b000c5e041",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "04d23061bbf18d5d81022eb21e9d32e99d24468d",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "d59948293ea34b6337ce2b5febab8510de70048c",
"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": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/can/bcm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72113
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32941 · Revision 1
- Added to Heist Feed
- Publisher date