CVE-2023-0386

A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.

Mitigation

To mitigate this issue, prevent the module overlay from being loaded. Please see <https://access.redhat.com/solutions/41278&gt; for information on how to blacklist a kernel module to prevent it from loading automatically.