p PatchFirst

CVE-2024-31081

CVE-2024-31081 · Xorg-x11-server: heap buffer overread/data leakage in procxipassivegrabdevice

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

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.

CVSS 7.3 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: system

Affected products and versions

Original sources

Check your server →