SB20261007104 - Use-after-free in Linux kernel virtio

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Main Vulnerability Database SB20261007104

SB20261007104 - Use-after-free in Linux kernel virtio

Published: October 7, 2026

Security Bulletin ID SB20261007104
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Information disclosure

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-98264)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a device to access freed memory.

The vulnerability exists due to use-after-free in the ALSA virtio sound driver's virtsnd_remove() and virtsnd_freeze() functions when deleting virtqueues before resetting the device. A local user can trigger device removal or freezing to cause a device to access freed memory.

Modern virtio-pci keeps enabled queues active until the device is reset. The affected removal path is also used during probe failures after DRIVER_OK.


Remediation

Install update from vendor's website.

References