Unknown

CVE-2026-72117 — can: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()

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.

Published Aug 15, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.22%

ahead of 12% of scored CVEs · Oct 30, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < b64f60c468d149aca22ea56bb842b9730215aaa5≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < 4b97410f4bba18d2ee2784c8e089104f387bc27c≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < 5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < 656ff69ef235699035e57d9e1ae417e62a38aa7f≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < 136de17f38630307991c59aa7080012a99451783≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < c312b750bb5ac3348cfc85dab25e90937bd4d251≥ ffd980f976e7fd666c2e61bf8ab35107efd11828 and < 58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8 and 1 more version 2.6.25	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 30, 2026 · 15 reading(s) · max 0.22%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 15, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/4b97410f4bba18d2ee2784c8e089104f387bc27c
NIST National Vulnerability Database
git.kernel.org/stable/c/b64f60c468d149aca22ea56bb842b9730215aaa5
NIST National Vulnerability Database
git.kernel.org/stable/c/c312b750bb5ac3348cfc85dab25e90937bd4d251
NIST National Vulnerability Database
git.kernel.org/stable/c/58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8
NIST National Vulnerability Database
git.kernel.org/stable/c/656ff69ef235699035e57d9e1ae417e62a38aa7f
NIST National Vulnerability Database
git.kernel.org/stable/c/136de17f38630307991c59aa7080012a99451783
NIST National Vulnerability Database
git.kernel.org/stable/c/5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c
NIST National Vulnerability Database
git.kernel.org/stable/c/c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-72117 is "can: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.22% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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