fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues (CVE-2026-64261) | HOL Guard CVE

High · CVSS 7.8CVE-2026-64261

fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues

Answer in brief

CVE-2026-64261 records a High severity (CVSS 7.8) vulnerability in fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues. 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 20, 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 <23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 \|\| >=4a9bfb9b6850fec0685447aed280533cf980de70 <95d7f50aff2a5f71557263ff25b97b2951f32bf8 \|\| >=4a9bfb9b6850fec0685447aed280533cf980de70 <d351da75066955144515cb2f9aa959f24a04287a	23a356e0bd96c8d5fb3ddff069f692bf10cab5c1, 95d7f50aff2a5f71557263ff25b97b2951f32bf8, d351da75066955144515cb2f9aa959f24a04287a
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 23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 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 use-after-free in fuse_uring_async_stop_queues fuse_uring_async_stop_queues() might run when the last reference on ring->queue_refs was already dropped. In order to avoid an early destruction a reference on struct fuse_conn is now taken before starting fuse_uring_async_stop_queues() and that reference is only released when that delayed work queue terminates.

Quoted source text, attributed separately from HOL analysis.