CVE-2026-53381

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-53381

Key Details

CVE	CVE-2026-53381
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-416 (Use After Free)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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

virtiofs: fix UAF on submount umount

iput() called from fuse_release_end() can Oops if the super block has

already been destroyed. Normally this is prevented by waiting for

num_waiting to go down to zero before commencing with super block shutdown.

This only works, however, for the last submount instance, as the wait

counter is per connection, not per superblock.

Revert to using synchronous release requests for the auto_submounts case,

which is virtiofs only at this time. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-53381
CVE	https://www.cve.org/CVERecord?id=CVE-2026-53381

Source

Reference

NVD

CVE