A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
https://bugzilla.redhat.com/show_bug.cgi?id=2036998
https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html