CVE-2022-48636

MEDIUM

Linux Kernel NULL Pointer Dereference in dasd_alias_get_start_dev

Title source: llm
STIX 2.1

Description

In the Linux kernel, the following vulnerability has been resolved: s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL. The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held. Fix by checking the pavgroup pointer with lcu->lock held.

References (8)

Core 8

Scores

CVSS v3 5.5
EPSS 0.0023
EPSS Percentile 13.2%
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 (27)
linux/Kernel 2.6.25 - 4.9.330linux
linux/Kernel 4.10.0 - 4.14.295linux
linux/Kernel 4.15.0 - 4.19.260linux
linux/Kernel 4.20.0 - 5.4.215linux
linux/Kernel 5.11.0 - 5.15.71linux
linux/Kernel 5.16.0 - 5.19.12linux
linux/Kernel 5.5.0 - 5.10.146linux
Linux/Linux < 2.6.25
Linux/Linux 2.6.25
Linux/Linux 4.14.295 - 4.14.*
... and 17 more
Published Apr 28, 2024
Tracked Since Feb 18, 2026