Dashboard / CVE-2026-109904

CVE-2026-109904

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 39/100
Published: 2026-11-13 Modified: 2026-11-13 First seen: 2026-11-13 Status: active

Attack Surface

Low Complexity No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: Low
UI: None
S: X
AT: None
VC: Low
VI: None
VA: High

Description

A buffer overread caused by an integer-overflow in Proc/SProcXResQueryClientIds in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by attackers on authenticated X clients to crash the server or leak out information.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
X.Org xorg-x11-server 0 < 21.1.26
X.Org xorg-x11-server 0 < 21.1.26
X.Org xwayland 0 < 24.1.15
X.Org xwayland 0 < 24.1.15

References & Advisories (2)

Bug Bounty Relevance

39 / 100
✓ Low complexity
✓ No user interaction

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.17%
Raw Score 0.001680
Percentile 6.2%
Date 2026-11-13

Intelligence Sources

mitre ref →
nvd ref →

External Links