HIGH

CVE-2026-93543

CVSS v3

7.4

HIGH

EPSS Score

0.2 %

exploit probability, as of 2026-09-29

CISA KEV

known exploited

Exploitation

—

SSVC status

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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H
Published: 2026-09-24
Last Modified: 2026-09-24

Frequently asked questions

What is CVE-2026-93543?

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.

Is CVE-2026-93543 actively exploited?

Active exploitation of CVE-2026-93543 has not been confirmed. Its EPSS score was 0.2% on 2026-09-29, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-93543?

CVE-2026-93543 has a CVSS v3 base score of 7.4 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H.

Is CVE-2026-93543 affecting your environment?

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