SB20260626184 - Use-after-free in Linux kernel misc driver

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Main Vulnerability Database SB20260626184

SB20260626184 - Use-after-free in Linux kernel misc driver

Published: June 26, 2026

Security Bulletin ID SB20260626184
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

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-2026-53160)

CWE-ID: CWE-416 - Use After Free

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to cause a use-after-free condition.

The vulnerability exists due to a use-after-free race in fastrpc_map_create in drivers/misc/fastrpc.c when handling concurrent MEM_UNMAP operations during map lookup and reference acquisition. A local user can trigger concurrent map operations to cause a use-after-free condition.

The issue occurs because a raw pointer is returned after releasing fl->lock and is later referenced without atomic reference acquisition under the lock.


Remediation

Install update from vendor's website.

References