CVE-2022-3565

A use-after-free flaw was found in the Linux kernel’s ISDN over IP tunnel functionality in how a local user triggers the release_card() function called from l1oip_cleanup(). This flaw allows a local user to crash or potentially escalate their privileges on the system.

Mitigation

To mitigate this issue, prevent the l1oip module 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.