SecuriTricks - CVE-2026-34002

Description

A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

Product(s) Impacted

Vendor	Product	Versions
Xorg	X Server	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-805

Buffer Access with Incorrect Length Value

The product uses a sequential operation to read or write a buffer, but it uses an incorrect length value that causes it to access memory that is outside of the bounds of the buffer.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	xorg	x_server	/	/	/	/	/	/	/	/

References

https://access.redhat.com/security/cve/CVE-2026-34002

https://bugzilla.redhat.com/show_bug.cgi?id=2451112

CVSS Score

6.1 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: HIGH
Integrity Impact: NONE
Availability Impact: LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L

View Vector String

Timeline

Published: May 5, 2026, 4:16 p.m.
Last Modified: May 5, 2026, 7:31 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-34002