SB20251226278 - Improper error handling in Linux kernel s390 block driver
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226278
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper error handling (CVE-ID: CVE-2023-54117)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the dcssblk_shared_store(), dcssblk_add_store() and dcssblk_remove_store() functions in drivers/s390/block/dcssblk.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6489ec0107860345bc57dcde39e63dfb05ac5c11
- https://git.kernel.org/stable/c/b5c531a9a7d8e047c90c909f09cef06a9f8e62f4
- https://git.kernel.org/stable/c/b7ad75c77349beb4983b9f27108d9b3f33ae1413
- https://git.kernel.org/stable/c/c8f40a0bccefd613748d080147469a4652d6e74c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.53
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6