CVE-2024-31080

A heap-based buffer over-read vulnerability was found in the X.org server’s
ProcXIGetSelectedEvents() function. This issue occurs when byte-swapped
length values are used in replies, potentially leading to memory leakage
and segmentation faults, particularly when triggered by a client with a
different endianness. This vulnerability could be exploited by an attacker
to cause the X server to read heap memory values and then transmit them
back to the client until encountering an unmapped page, resulting in a
crash. Despite the attacker’s inability to control the specific memory
copied into the replies, the small length values typically stored in a
32-bit integer can result in significant attempted out-of-bounds reads.

Notes