SB20260727246 - Improper handling of exceptional conditions in Linux kernel block

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Main Vulnerability Database SB20260727246

SB20260727246 - Improper handling of exceptional conditions in Linux kernel block

Published: July 27, 2026

Security Bulletin ID SB20260727246
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) Improper handling of exceptional conditions (CVE-ID: CVE-2026-64326)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

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 denial of service.

The vulnerability exists due to improper exceptional condition handling in bdev_mark_dead() when processing surprise removal of a block device. A local user can trigger surprise device removal to cause a denial of service.

The issue can hang indefinitely while waiting for writeback that can no longer complete, wedging the reset worker and tasks waiting on it.


Remediation

Install update from vendor's website.

References