What’s Vulnerable › Vulnerabilities

CVE-2026-64260: fuse-uring: Avoid queue->stopped races and set/read that value under lock

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% 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-362

Description

In the Linux kernel, the following vulnerability has been resolved: fuse-uring: Avoid queue->stopped races and set/read that value under lock There are several readers of queue->stopped that check the value under lock, but fuse_uring_commit_fetch() did not and actually the value was not set under the lock in fuse_uring_abort_end_requests() either. Especially in fuse_uring_commit_fetch it is important to check under a lock, because due to races 'struct fuse_req' might be freed with fuse_request_end, but another thread/cpu might already do teardown work.

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/39c8e925b207afceffaa5382416ed405e0223a03
• https://git.kernel.org/stable/c/4021a3a79eee551d95fe1e1e7c1b195d34ba8c08
• https://git.kernel.org/stable/c/b70a3aca16934c196f92abb17b01c1647b9bb63c

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