CVE-2022-48636: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 2.6.25, before 4.9.330 (fixed in 4.9.330); from 4.10, before 4.14.295 (fixed in 4.14.295); from 4.15, before 4.19.260 (fixed in 4.19.260); from 4.20, before 5.4.215 (fixed in 5.4.215); from 5.5, before 5.10.146 (fixed in 5.10.146); from 5.11, before 5.15.71 (fixed in 5.15.71); …

Published 2024-04-28. Last modified 2026-08-04.