What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-25 · updated 2026-08-17
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 6.14 before 6.18.39; from 6.19 before 7.1.4 — fixed in 6.18.39, 7.1.4

How to fix

Upgrade to a fixed version: Linux kernel 6.18.39, 7.1.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1
• https://git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8
• https://git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a

Get alerted when CVE-2026-64261 or the next vulnerability affects your stack