CVE-2023-1252

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.

This flaw is possibly only triggered if an Ext4 filesystem is mounted. Because of that fact, and because exploitation would require that an attacker was able to control how that filesystem interacted with an OverlayFS filesystem, Red Hat assesses the impact of this vulnerability as Medium.

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.