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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-1252
• https://lore.kernel.org/lkml/20211115165433.449951285%40linuxfoundation.org
• https://lore.kernel.org/lkml/[email protected]
• https://security.netapp.com/advisory/ntap-20230505-0005