CVE-2021-47337
kernel: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · May 21, 2024
Updated · September 28, 2026
Description
A vulnerability was found in the Linux kernel's SCSI subsystem. The issue occurs when the system tries to stop an error handler thread that failed to start; if the thread fails to spawn, the kernel may dereference a bad pointer, leading to potential system crash.
Statement
This vulnerability is rated as a moderate severity because the impact is limited to system reliability, with no direct effect on confidentiality or integrity.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-253 · Incorrect Check of Function Return Value