CVE-2026-64261
fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
Aug. 17, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the latest stable version.
- Review kernel change logs for specific patch details.
- Test the system thoroughly after applying updates.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64261.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64261 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64261
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64261 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64261 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '23a356e0bd96c8d5fb3ddff069f692bf10cab5c1', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '95d7f50aff2a5f71557263ff25b97b2951f32bf8', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': 'd351da75066955144515cb2f9aa959f24a04287a', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '23a356e0bd96c8d5fb3ddff069f692bf10cab5c1', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '95d7f50aff2a5f71557263ff25b97b2951f32bf8', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': 'd351da75066955144515cb2f9aa959f24a04287a', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'affected'}] -
Initial Analysis by [email protected]
Aug. 12, 2026
Action Type Old Value New Value Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.14 up to (excluding) 6.18.39 Added Reference Type kernel.org: https://git.kernel.org/stable/c/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '23a356e0bd96c8d5fb3ddff069f692bf10cab5c1', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': '95d7f50aff2a5f71557263ff25b97b2951f32bf8', 'versionType': 'git'}, {'status': 'affected', 'version': '4a9bfb9b6850fec0685447aed280533cf980de70', 'lessThan': 'd351da75066955144515cb2f9aa959f24a04287a', 'versionType': 'git'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/fuse/dev_uring.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 Added Reference https://git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8 Added Reference https://git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a