SB2025100181 - Race condition in Linux kernel block null_blk driver
Published: October 1, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100181
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) Race condition (CVE-ID: CVE-2023-53531)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the null_poll() and null_timeout_rq() functions in drivers/block/null_blk/main.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.