Use After Free Affecting linux-virt package, versions <6.12.20-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRT-13310419
  • published6 Oct 2025
  • disclosed1 Apr 2025

Introduced: 1 Apr 2025

CVE-2025-21945  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt to version 6.12.20-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt package and not the linux-virt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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

ksmbd: fix use-after-free in smb2_lock

If smb_lock->zero_len has value, ->llist of smb_lock is not delete and flock is old one. It will cause use-after-free on error handling routine.

CVSS Base Scores

version 3.1