CVE-2024-21885

Xorg-x11-server: heap buffer overflow in xisenddevicehierarchyevent

HIGH
7.8
CVSS Score
Published: February 28, 2024 at 12:11 PM UTC
Updated: June 17, 2026 at 07:10 AM UTC
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Severity
HIGH7.8
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution in SSH X11 forwarding environments.

Affected

We have no canonical product record for this CVE. The source names may not have matched any product.

References (22)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-122

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