7.8

CVE-2026-64261: fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues

Analyzed
AliasesUBUNTU-CVE-2026-64261DEBIAN-CVE-2026-64261CGA-89xr-7p3r-2mq7
Published 25-07-2026Last modified 17-08-2026

Vulnerability summary

CVE-2026-64261 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.17%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 13
OPENSUSE-SU-2026:11476-1USN-8726-1USN-8726-2USN-8726-3USN-8726-4USN-8727-1

Timeline

  1. 25-07-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.16% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu119 products
  • linux< 7.0.0-31.31
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 7.0.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Chainguard2 products
  • linux-gcp-6.18< 6.18.44-r0
  • linux-gcp-6.18-bootc< 6.18.44-r0
Linux2 products
  • linux≥ 4a9bfb9b6850fec0685447aed280533cf980de70, < 23a356e0bd96c8d5fb3ddff069f692bf10cab5c1 | ≥ 4a9bfb9b6850fec0685447aed280533cf980de70, < 95d7f50aff2a5f71557263ff25b97b2951f32bf8 | ≥ 4a9bfb9b6850fec0685447aed280533cf980de70, < d351da75066955144515cb2f9aa959f24a04287a | 6.14
  • linux_kernel≥ 6.14, < 6.18.39 | ≥ 6.19, < 7.1.4
Debian1 product
  • linux< 7.1.4-1

4 vendors · 124 products

References

21 links
Show all 21 references