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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64261
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-25 10:17:06 UTC
Updated2026-07-30 15:00:27 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001570000 probability, percentile 0.053570000 (date 2026-08-01)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4a9bfb9b6850fec0685447aed280533cf980de70 23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 git Not specified
CNA Linux Linux affected 4a9bfb9b6850fec0685447aed280533cf980de70 95d7f50aff2a5f71557263ff25b97b2951f32bf8 git Not specified
CNA Linux Linux affected 4a9bfb9b6850fec0685447aed280533cf980de70 d351da75066955144515cb2f9aa959f24a04287a git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.39 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.4 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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