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

What is CVE-2026-64261?

CVE-2026-64261 is a high-severity use after free vulnerability in Linux kernel, published on 25 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-416

Which versions are affected by CVE-2026-64261?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-64261?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-64261 being exploited?

There is no known exploitation of CVE-2026-64261 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-64261, DEBIAN-CVE-2026-64261, GHSA-49p8-h7pf-grwp, ROOT-OS-UBUNTU-2204-CVE-2026-64261, UBUNTU-CVE-2026-64261.