CVE-2026-64258

linux: In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent...

CVE-2026-64258 is fixed in 20 products on 1 platform, first by ALAS2023-2026-2045, released August 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0016
5th percentile

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.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool6.18 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel-livepatch-6.18.39-79.141 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-devel · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-headers · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-tools · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
linux · Debian 14 7.1.4-1 DEBIAN-CVE-2026-64258 Aug 7, 2026
microvm-kernel6.18 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
perf6.18 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
python3-perf6.18 · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.39-79.141.amzn2023 ALAS2023-2026-2045 Aug 3, 2026

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