🛡️ CVE-2024-31080 on Ubuntu — xorg-server

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Distribution advisory

This page covers CVE-2024-31080 as tracked by Ubuntu, for the package xorg-server. The fix is available in version 2:21.1.12-1ubuntu1; earlier versions remain affected.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity low, availability high.

Affected software and timeline

Affected software: xorg-server (fixed in 2:21.1.12-1ubuntu1), xorg-server-hwe-16.04, xorg-server-hwe-18.04 and xwayland (fixed in 2:22.1.1-1ubuntu0.12). Published on 4 March 2024 and last revised on 22 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

CVE-2024-31080 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2024-03-04
Updated 2026-06-15
Modified 2026-04-22
Fix URL N/A

Affected Packages

Software From version Fixed in
xorg-server — 2:21.1.12-1ubuntu1
xorg-server-hwe-16.04 — —
xorg-server-hwe-18.04 — —
xwayland — 2:22.1.1-1ubuntu0.12

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