SB2026072154 - Use-after-free in Linux kernel serial 8250 driver

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Main Vulnerability Database SB2026072154

SB2026072154 - Use-after-free in Linux kernel serial 8250 driver

Published: July 21, 2026

Security Bulletin ID SB2026072154
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-53384)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to a use-after-free in the 8250_dw serial driver when handling a failed clock notifier registration during device probe. A local user can trigger the error path and access the stale port slot to cause a denial of service or execute arbitrary code.

The issue occurs because the 8250 port remains registered after probe failure while its associated driver data has already been freed.


Remediation

Install update from vendor's website.

References