fuse-uring: Avoid queue->stopped races and set/read that value under lock (CVE-2026-64260) | HOL Guard CVE

High · CVSS 7.8CVE-2026-64260

fuse-uring: Avoid queue->stopped races and set/read that value under lock

Answer in brief

CVE-2026-64260 records a High severity (CVSS 7.8) vulnerability in fuse-uring: Avoid queue->stopped races and set/read that value under lock. 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 Jul 25, 2026Updated Aug 17, 2026Source checked Sep 19, 2026First seen by HOL Aug 5, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 3 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.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=4a9bfb9b6850fec0685447aed280533cf980de70 <39c8e925b207afceffaa5382416ed405e0223a03 \|\| >=4a9bfb9b6850fec0685447aed280533cf980de70 <4021a3a79eee551d95fe1e1e7c1b195d34ba8c08 \|\| >=4a9bfb9b6850fec0685447aed280533cf980de70 <b70a3aca16934c196f92abb17b01c1647b9bb63c	39c8e925b207afceffaa5382416ed405e0223a03, 4021a3a79eee551d95fe1e1e7c1b195d34ba8c08, b70a3aca16934c196f92abb17b01c1647b9bb63c
Linux/Linuxgeneric	6.14	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 39c8e925b207afceffaa5382416ed405e0223a03 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 25, 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 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: fuse-uring: Avoid queue->stopped races and set/read that value under lock There are several readers of queue->stopped that check the value under lock, but fuse_uring_commit_fetch() did not and actually the value was not set under the lock in fuse_uring_abort_end_requests() either. Especially in fuse_uring_commit_fetch it is important to check under a lock, because due to races 'struct fuse_req' might be freed with fuse_request_end, but another thread/cpu might already do teardown work.

Quoted source text, attributed separately from HOL analysis.