SB20251230286 - Division by zero in Linux kernel block
Published: December 30, 2025 Updated: December 30, 2025
Security Bulletin ID
SB20251230286
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) Division by zero (CVE-ID: CVE-2023-54242)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a division by zero error within the bfqq_request_over_limit() function in block/bfq-iosched.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/1655cfc85250a224b0d9486c8136baeea33b9b5c
- https://git.kernel.org/stable/c/c0346a59d719461248c6dc6f21c9e55ef836b66f
- https://git.kernel.org/stable/c/e53413f8deedf738a6782cc14cc00bd5852ccf18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.30
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4