CVE-2026-72117 (GCVE-0-2026-72117)
Vulnerability from cvelistv5
Published
2026-08-15 05:52
Modified
2026-08-19 16:36
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
can: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()
For an rx op subscribed on all interfaces (ifindex == 0), the same op
is registered once in the shared per-netns wildcard filter list, so
bcm_rx_handler() can run concurrently on different CPUs for frames
arriving on different net devices.
op->rx_stamp and op->rx_ifindex were written before bcm_rx_update_lock was
taken, allowing concurrent writers to race each other - including a torn
store of the 64-bit rx_stamp on 32-bit platforms.
Beyond a torn store bcm_send_to_user() must report the timestamp/ifindex
of the very same frame whose content it is delivering. So the assignment
is placed in the same unbroken bcm_rx_update_lock section as the content
comparison.
As a side effect, the RTR-request frame feature (which never reach
bcm_send_to_user()) no longer updates rx_stamp/rx_ifindex, since only
the notification path needs them.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 Version: ffd980f976e7fd666c2e61bf8ab35107efd11828 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/can/bcm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "b64f60c468d149aca22ea56bb842b9730215aaa5",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "4b97410f4bba18d2ee2784c8e089104f387bc27c",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "656ff69ef235699035e57d9e1ae417e62a38aa7f",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "136de17f38630307991c59aa7080012a99451783",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "c312b750bb5ac3348cfc85dab25e90937bd4d251",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
},
{
"lessThan": "58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8",
"status": "affected",
"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/can/bcm.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.25"
},
{
"lessThan": "2.6.25",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "2.6.25",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "2.6.25",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()\n\nFor an rx op subscribed on all interfaces (ifindex == 0), the same op\nis registered once in the shared per-netns wildcard filter list, so\nbcm_rx_handler() can run concurrently on different CPUs for frames\narriving on different net devices.\n\nop-\u003erx_stamp and op-\u003erx_ifindex were written before bcm_rx_update_lock was\ntaken, allowing concurrent writers to race each other - including a torn\nstore of the 64-bit rx_stamp on 32-bit platforms.\n\nBeyond a torn store bcm_send_to_user() must report the timestamp/ifindex\nof the very same frame whose content it is delivering. So the assignment\nis placed in the same unbroken bcm_rx_update_lock section as the content\ncomparison.\n\nAs a side effect, the RTR-request frame feature (which never reach\nbcm_send_to_user()) no longer updates rx_stamp/rx_ifindex, since only\nthe notification path needs them."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:36:08.847Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b64f60c468d149aca22ea56bb842b9730215aaa5"
},
{
"url": "https://git.kernel.org/stable/c/c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5"
},
{
"url": "https://git.kernel.org/stable/c/4b97410f4bba18d2ee2784c8e089104f387bc27c"
},
{
"url": "https://git.kernel.org/stable/c/5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c"
},
{
"url": "https://git.kernel.org/stable/c/656ff69ef235699035e57d9e1ae417e62a38aa7f"
},
{
"url": "https://git.kernel.org/stable/c/136de17f38630307991c59aa7080012a99451783"
},
{
"url": "https://git.kernel.org/stable/c/c312b750bb5ac3348cfc85dab25e90937bd4d251"
},
{
"url": "https://git.kernel.org/stable/c/58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8"
}
],
"title": "can: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72117",
"datePublished": "2026-08-15T05:52:56.991Z",
"dateReserved": "2026-08-09T03:40:39.906Z",
"dateUpdated": "2026-08-19T16:36:08.847Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…