SB2026100757 - Use-after-free in Linux kernel net wireless driver

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Main Vulnerability Database SB2026100757

SB2026100757 - Use-after-free in Linux kernel net wireless driver

Published: October 7, 2026

Security Bulletin ID SB2026100757
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

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-2026-98311)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a use-after-free in the kernel.

The vulnerability exists due to use-after-free in virt_wifi_newlink() when transferring operational state before device registration. A local user can attempt to create a virtual wireless device with an invalid name while its lower device is dormant to trigger a use-after-free in the kernel.

Exploitation requires device registration to fail and a subsequent linkwatch_fire_event() call to access the queued list entry after the device object has been freed.


Remediation

Install update from vendor's website.

References