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Ubuntu 26.04 LTS libXpm Critical Crash Vulnerability CVE-2026-4367

ubuntu
Calendar Grey July 23, 2026
Scroller Ubuntu
libXpm in Ubuntu can crash with crafted files, risking denial of service if not updated. Critical updates recommended.
A vulnerability in libXpm affects Ubuntu 22.04, 24.04, and 26.04 LTS, potentially leading to crashes

Summary

libXpm could be made to crash if it opened a specially crafted file.

Software Description:

- libxpm: X11 pixmap library

Details:

Naoki Wakamatsu discovered that libXpm did not properly validate file

boundaries when processing XPM image files. An attacker could possibly use

this issue to cause libXpm to crash, resulting in a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libXpm x11 library

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
  libxpm4                         1:3.5.17-1ubuntu0.26.04.1
  xpmutils                        1:3.5.17-1ubuntu0.26.04.1

Ubuntu 24.04 LTS
  libxpm4                         1:3.5.17-1ubuntu0.24.04.1
  xpmutils                        1:3.5.17-1ubuntu0.24.04.1

Ubuntu 22.04 LTS
  libxpm4                         1:3.5.12-1ubuntu0.22.04.3
  xpmutils                        1:3.5.12-1ubuntu0.22.04.3

In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8600-1

CVE-2026-4367

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8600-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu libXpm x11 library

Package Information

https://launchpad.net/ubuntu/+source/libxpm/1:3.5.17-1ubuntu0.26.04.1
https://launchpad.net/ubuntu/+source/libxpm/1:3.5.17-1ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/libxpm/1:3.5.12-1ubuntu0.22.04.3

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