CVE Tools
Sign in

CVE-2026-34002

Xorg: xwayland: x.org x server: information disclosure or denial of service via out-of-bounds read in xkb modifier map handling

Published: May 5, 2026Updated: Jun 8, 2026 Sources: CVE List NVD BDUCWE-805
6.1MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 61.8%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:LUI:NS:UC:HI:NA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-805

Affected Products

АЛЬТ СП 10АО «ИВК»
On-premOS
Operating Systems / linux-distro
X.Org ServerX.Org FoundationOperating Systems / unix-bsd
XWaylandСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
x serverx.org
On-prem
Operating Systems / unix-bsd
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
ао «ивк»commercialRUOperating Systemsaka ivk
x.org foundationoss-projectUSOperating Systemsaka xorg-server, xlib, libx11
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
x.orgoss-projectUSOperating Systems
redhatcommercialUSOperating Systemsaka red hat
and 19 more affected products View all →

Exploitability

Official Patch Available
Workaround Available

References

https://lists.x.org/archives/xorg-announce/2026-April/003679.html
lists.x.org
https://lists.x.org/archives/xorg-announce/2026-April/003678.html
lists.x.org
https://opennet.ru/opennews/art.shtml?num=65210
opennet.ru
and 27 more references View all →

Timeline

Published
May 5, 2026
Last Updated
Jun 8, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-34002 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows