CVE-2023-1252: Linux Kernel

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

A use-after-free flaw was found in the Linux kernel’s Ext4 File System in how a user triggers several file operations simultaneously with the overlay FS usage. This flaw allows a local user to crash or potentially escalate their privileges on the system. Only if patch 9a2544037600 ("ovl: fix use after free in struct ovl_aio_req") not applied yet, the kernel could be affected.

Affected products

• Linux Linux Kernel: from 5.6, before 5.10.80 (fixed in 5.10.80); from 5.11, before 5.14.19 (fixed in 5.14.19); from 5.15, before 5.15.3 (fixed in 5.15.3)

Published 2023-03-23. Last modified 2026-06-17.