SB2026082747 - Use-after-free in Linux kernel block

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026082747

SB2026082747 - Use-after-free in Linux kernel block

Published: August 27, 2026

Security Bulletin ID SB2026082747
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-80589)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a use-after-free in disk_release in the block layer when handling a probe failure for a disk that issued I/O before add_disk(). A remote attacker can trigger a failed disk initialization sequence that leaves a queue timeout timer pending to execute arbitrary code.

The issue can occur when a disk probe fails before the disk is added, including cases involving NVMe namespace initialization.


Remediation

Install update from vendor's website.

References