A heap-based buffer over-read vulnerability was found in the X.org server's ProcXIPassiveGrabDevice() 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.

Red Hat, Inc. AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Red Hat, Inc. CWE-126

Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2024-31081 [No types assigned]

Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2271998 [No types assigned]