CVE-2023-2248

An out-of-bounds memory access flaw was found in the Linux kernel’s traffic control (QoS) subsystem in how a user triggers the qfq_change_class function with an incorrect MTU value of the network device used as lmax. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Mitigation

To mitigate this issue, prevent the module, sch_qfq 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.