SB20240531306 - NULL pointer dereference in Linux kernel block
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531306
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) NULL pointer dereference (CVE-ID: CVE-2021-47552)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the disk_release() function in block/genhd.c, within the blk_release_queue() function in block/blk-sysfs.c, within the blk_mq_rq_cpu() function in block/blk-mq.c, within the blk_cleanup_queue() function in block/blk-core.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.