CVE-2023-53292

MEDIUM

Linux Kernel < 6.4.7 - NULL Pointer Dereference in blk-mq Elevator Switch

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix NULL dereference on q->elevator in blk_mq_elv_switch_none After grabbing q->sysfs_lock, q->elevator may become NULL because of elevator switch. Fix the NULL dereference on q->elevator by checking it with lock.

References (3)

Core 3

Core References

Patch

https://git.kernel.org/stable/c/3e977386521b71471e66ec2ba82efdfcc456adf2

Patch

https://git.kernel.org/stable/c/245165658e1c9f95c0fecfe02b9b1ebd30a1198a

https://git.kernel.org/stable/c/988ddb77218d3975dd13dee7bb0e1fae098a9fdb

Scores

CVSS v3 5.5

EPSS 0.0014

EPSS Percentile 3.3%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (9)

Linux/Linux < 5.19

Linux/Linux 5.19

Linux/Linux 5fd7a84a09e640016fe106dd3e992f5210e23dc7 - 245165658e1c9f95c0fecfe02b9b1ebd30a1198a

Linux/Linux 5fd7a84a09e640016fe106dd3e992f5210e23dc7 - 3e977386521b71471e66ec2ba82efdfcc456adf2

Linux/Linux 5fd7a84a09e640016fe106dd3e992f5210e23dc7 - 988ddb77218d3975dd13dee7bb0e1fae098a9fdb

Linux/Linux 6.1.175 - 6.1.*

Linux/Linux 6.4.7 - 6.4.*

Linux/Linux 6.5

linux/linux_kernel < 6.4.7

Published Sep 16, 2025

Tracked Since Feb 18, 2026