PT-2026-64479 · Linux · Linux

CVE-2026-64258 · Published 2026-07-25 · Updated 2026-07-25

NVD

In the Linux kernel, the following vulnerability has been resolved:

fuse-uring: remove request-less entries from ent w req queue to fix NULL deref

If a copy into the userspace ring buffer fails, a request will be terminated and fuse uring req end() will set ent->fuse req to NULL but it will leave the entry on ent w req queue in FRRS FUSE REQ state. This can lead to a NULL deref if the request expiration logic scans ent w req queue in the window before the entry is moved off it.

Fix this by taking the entry off ent w req queue and changing its state from FRRS FUSE REQ to FRRS INVALID before terminating the request.

Related Identifiers

CVE-2026-64258

Affected Products

Linux

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-64258 · Security Note
• https://git.kernel.org/stable/c/1c57a69be962d459c5e705f5cb4355b841b3461c · Note
• https://git.kernel.org/stable/c/0a7f33010c0e4cd92937e088a54350381fd0fbf2 · Note
• https://git.kernel.org/stable/c/0b466cf1b96e191b06b496c4de79da15315c3a9a · Note