6.5

CVE-2026-94283: x.org libx11 Out-of-bounds Read

CVSS: 6.5v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-94283DEBIAN-CVE-2026-94283ALPINE-CVE-2026-94283
Published 28-09-2026Last modified 30-09-2026
Open JSON

Vulnerability summary

CVE-2026-94283 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in x.org libx11. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.1% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.20%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 9 · Related 7
MGASA-2026-0508OPENSUSE-SU-2026:11894-1RHSA-2026:79278SUSE-SU-2026:24118-1SUSE-SU-2026:4410-1SUSE-SU-2026:4500-1

Timeline

  1. 28-09-2026
    PublishedVulnerability first disclosed.
  2. 30-09-2026
    Last modifiedVulnerability information updated.

Description

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

28-09-202619-10-2026
EPSS score
0.20%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine1 product
  • libx11< 1.8.14-r0
Debian1 product
  • libx11All versions (No fix recorded)
Ubuntu1 product
  • libx11All versions (No fix recorded) | < 2:1.6.2-1ubuntu2.1+esm6 | < 2:1.6.3-1ubuntu2.2+esm5 | < 2:1.6.4-3ubuntu0.4+esm3 | < 2:1.6.9-2ubuntu1.6+esm1 | < 2:1.7.5-1ubuntu0.4 | < 2:1.8.7-1ubuntu0.1 | < 2:1.8.13-1ubuntu0.1
X.org1 product

4 vendors · 4 products

References

7 links