7.4

CVE-2026-93543: x.org libxi Out-of-bounds Read

CVSS: 7.4v3.1HighAwaiting analysis
AliasesUBUNTU-CVE-2026-93543DEBIAN-CVE-2026-93543ALPINE-CVE-2026-93543
Published 24-09-2026Last modified 24-09-2026
Open JSON

Vulnerability summary

CVE-2026-93543 is a high (CVSS 7.4) Out-of-bounds Read vulnerability in x.org libxi. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 14.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.25%
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 5 · Related 3
MGASA-2026-0526OPENSUSE-SU-2026:11895-1OPENSUSE-SU-2026:22054-1RHSA-2026:71839SUSE-SU-2026:24119-1

Timeline

  1. 24-09-2026
    PublishedVulnerability first disclosed.
  2. 24-09-2026
    Last modifiedVulnerability information updated.

Description

An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

25-09-202619-10-2026
EPSS score
0.25%

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
  • libxi< 1.8.4-r0
Debian1 product
  • libxiAll versions (No fix recorded)
Ubuntu1 product
  • libxiAll versions (No fix recorded)
X.org1 product

4 vendors · 4 products

References

5 links