can: bcm: track a single source interface for ANYDEV timeout/throttle ops
In the Linux kernel, the following vulnerability has been resolved: can: bcm: track a single source interface for ANYDEV timeout/throttle ops An ANYDEV rx op (ifindex == 0) with an active RX timeout and/or throttle timer has no defined semantics when matching frames arrive from several interfaces: bcm_rx_handler() can run concurrently for the same op on different CPUs, racing hrtimer_cancel()/ bcm_rx_starttimer() against bcm_rx_timeout_handler() and causing spurious RX_TIMEOUT notifications and last_frames corruption. The same concurrency lets throttled multiplex frames from different interfaces clobber the single rx_ifindex/rx_stamp fields shared by the op. Add op->if_detected to track the first interface that delivers a matching frame while a timeout/throttle timer is configured, and reject frames from any other interface for that op. The claim is decided in bcm_rx_handler() before hrtimer_cancel() touches op->timer, so a rejected frame can never disturb the claimed interface's watchdog. RTR-mode ops are excluded via RX_RTR_FRAME, independent of kt_ival1/kt_ival2, since those may briefly hold a stale value from an earlier non-RTR configuration. The claim is released in bcm_notify() on NETDEV_UNREGISTER and in bcm_rx_setup() when SETTIMER reconfigures the timer values. A (re-)claim is only possible on CAN devices in NETREG_REGISTERED dev->reg_state to cover the release in bcm_notify() where reg_state becomes NETREG_UNREGISTERING until synchronize_net().
CVE-2026-72115
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-2026-72115
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": "f147f48837cb1426521f5b3c3b3134c71128a25d",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "57cf104da4cf450ae9c16801a3164604b801d2cc",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "03dfe347c398fa41a7e30e8dc538f12568c183e6",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "18b45251e74e35668f0dd0c470549384ae191ecf",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "3ff8c24b421070a2db99a5cdb86edc9ff339418e",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "eca8b44d51fc6ab61022258ec968e55e3073b79e",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "b6317022b685a430a3ae420456716e3c0c02ef4b",
"versionType": "git"
},
{
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"lessThan": "2f5976f54a04e9f18b25283036ac3136be453b17",
"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-2026-72115
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32944 · Revision 1
- Added to Heist Feed
- Publisher date