can: raw: add locking for raw flags bitfield

Answer in brief

CVE-2026-68387 records a High severity (CVSS 7.8) vulnerability in can: raw: add locking for raw flags bitfield. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 10, 2026Updated Aug 17, 2026Source checked Sep 24, 2026First seen by HOL Aug 10, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=890e5198a6e5b238627c245fafea1a92670a86cd <00ba4bf8798242253fefc1fa6a78db1d445fd024 \|\| >=890e5198a6e5b238627c245fafea1a92670a86cd <57791aab1129c9405f84bb0882de58967d8b44cd \|\| >=890e5198a6e5b238627c245fafea1a92670a86cd <1e5185c090589f4146d728ab36417d8a5419f127	00ba4bf8798242253fefc1fa6a78db1d445fd024, 57791aab1129c9405f84bb0882de58967d8b44cd, 1e5185c090589f4146d728ab36417d8a5419f127
Linux/Linuxgeneric	6.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 00ba4bf8798242253fefc1fa6a78db1d445fd024 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 10, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: can: raw: add locking for raw flags bitfield With commit 890e5198a6e5 ("can: raw: use bitfields to store flags in struct raw_sock") the formerly separate integer values have been integrated into a single bitfield. This led to a read-modify-write operation when changing a flag in raw_setsockopt() which now needs a locking to prevent concurrent access. Instead of adding a lock/unlock hell in each of the flag manipulations this patch introduces a wrapper for a new raw_setsockopt_locked() function analogue to the isotp_setsockopt[_locked]() approach in net/can/isotp.c [mkl: use Closes tag instead of Link]

Quoted source text, attributed separately from HOL analysis.