NULL pointer dereference in Linux kernel - CVE-2021-47552
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90397
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-47552
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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.