CVE Database›Document archive›CVE-2021-47337

CVE-2021-47337

kernel: scsi: core: Fix bad pointer dereference when ehandler kthread is invalid

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Severity

Moderate

Red Hat Product Security

5.5

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 · 5.5
CVSS: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