SB2026082789 - Race condition in Linux kernel s390 cio driver

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Main Vulnerability Database SB2026082789

SB2026082789 - Race condition in Linux kernel s390 cio driver

Published: August 27, 2026

Security Bulletin ID SB2026082789
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) Race condition (CVE-ID: CVE-2026-80548)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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 escalate privileges and compromise confidentiality, integrity, and availability.

The vulnerability exists due to a race condition in the vfio_ccw I/O resource handling and channel program lifecycle management when processing concurrent I/O operations and state transitions. A local user can trigger concurrent operations to escalate privileges and compromise confidentiality, integrity, and availability.

The issue affects the s390 vfio_ccw driver.


Remediation

Install update from vendor's website.

References