CVE-2026-93827 Linux kernel virtio-fs - Use After Free

Linux kernel virtio-fs contains a double-free vulnerability caused by improper cleanup of fs->vqs and fs->mq_map pointers during failed queue setup in virtio_fs_setup_vqs(), letting attackers trigger double-free during probe failure cleanup, exploit requires a broken virtio-fs device advertising more request queues than supported.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
24 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for virtio-fs double-free issue.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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