SB2026062957 - Improper input validation in Linux kernel scsi driver

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Main Vulnerability Database SB2026062957

SB2026062957 - Improper input validation in Linux kernel scsi driver

Published: June 29, 2026

Security Bulletin ID SB2026062957
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 input validation (CVE-ID: CVE-2026-53304)

CWE-ID: CWE-20 - Improper input validation

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


The vulnerability allows a local privileged user to cause a denial of service.

The vulnerability exists due to improper input validation in the sg driver def_reserved_size module parameter handling when opening /dev/sgX after assigning an invalid value to the parameter. A local privileged user can write a negative or oversized value to the def_reserved_size sysfs parameter and then open a sg device node to cause a denial of service.


Remediation

Install update from vendor's website.

References