CVE-2026-64258
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.
Affected versions
Linux kernel versions
6.16
and later are affected. Fixed in
6.18.39,
7.1.4,
7.2-rc1
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-64258?
CVE-2026-64258 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.39, 7.1.4 and 7.2-rc1. CVE-2026-64258 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-64258?
Yes. CVE-2026-64258 has been patched. Fixed versions include 6.18.39, 7.1.4 and 7.2-rc1. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-64258 actively exploited?
No. CVE-2026-64258 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.