Out-of-bounds read in libXpm - CVE-2026-4367

Vulnerability identifier: #VU126829

CSH Severity: Medium

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-4367

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in xpmNextWord() when parsing a malformed color table definition in an XPM file. A remote attacker can supply a specially crafted XPM file to disclose sensitive information.

User interaction is required to process the crafted XPM file.

libXpm
openEuler
Ubuntu
Anolis OS
libxpm (Ubuntu package)
libXpm
libXpm-debuginfo
libXpm-debugsource
libXpm-devel
libXpm-help
libXpm-doc

Install security update from vendor's website.

libXpm - update to 3.5.19
libxpm (Ubuntu package) - addressed in versions 1:3.5.12-1ubuntu0.22.04.3, 1:3.5.17-1ubuntu0.24.04.1, 1:3.5.17-1ubuntu0.26.04.1
libXpm - update to 3.5.13-4
libXpm-debuginfo - update to 3.5.13-4
libXpm-debugsource - update to 3.5.13-4
libXpm-devel - update to 3.5.13-4
libXpm-help - update to 3.5.13-4
libXpm - update to 3.5.17-2
libXpm-devel - update to 3.5.17-2
libXpm-doc - update to 3.5.17-2

• https://www.openwall.com/lists/oss-security/2026/04/21/3

• Information disclosure in libXpm
• openEuler update for libXpm
• Anolis OS update for libXpm
• Ubuntu update for libxpm