SB2025100548 - Improper error handling in Linux kernel block null_blk driver
Published: October 5, 2025 Updated: October 27, 2025
Security Bulletin ID
SB2025100548
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-2023-53576)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the null_init_tag_set() function 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.
References
- https://git.kernel.org/stable/c/35e304dbcefa95237a3d6f94c007bfb10f012b17
- https://git.kernel.org/stable/c/63f8793ee60513a09f110ea460a6ff2c33811cdb
- https://git.kernel.org/stable/c/651260e563d9f50827dac496dc8a0b9b23d5db1a
- https://git.kernel.org/stable/c/e732a266b973cd4e115e2cc2ea5007119e8a7fbc
- https://git.kernel.org/stable/c/fd35b7bb6d5a329c427924886949ab51f210200a
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.30