Riskcovery

CVE-2026-64258

fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref

State
Published
Severity
Not scored
Published
Jul 25, 2026
Updated
Aug 17, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 4fea593e625cd50d4d11be227007849b12f17bfb to before 0b466cf1b96e191b06b496c4de79da15315c3a9aAffected
  • 4fea593e625cd50d4d11be227007849b12f17bfb to before 0a7f33010c0e4cd92937e088a54350381fd0fbf2Affected
  • 4fea593e625cd50d4d11be227007849b12f17bfb to before 1c57a69be962d459c5e705f5cb4355b841b3461cAffected
LinuxLinux
  • 6.16Affected
  • before 6.16Not affected
  • 6.18.39 through 6.18.*Not affected
  • 7.1.4 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.