[USN-8040-1] MUNGE vulnerability

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Ubuntu Security Notice USN-8040-1
February 12, 2026

munge vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

MUNGE could be made to crash or run programs as your login if it opened a
specially crafted file.

Software Description:
- munge: authentication service for credentials

Details:

Titouan Lazard discovered that MUNGE contained an exploitable buffer
overflow in munged (the MUNGE authentication daemon). A local attacker
could possibly use this issue to forge MUNGE credentials, leading to
arbitrary code execution.

Update instructions:

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

Ubuntu 25.10
libmunge-dev 0.5.16-1ubuntu0.1
libmunge2 0.5.16-1ubuntu0.1
munge 0.5.16-1ubuntu0.1

Ubuntu 24.04 LTS
libmunge-dev 0.5.15-4ubuntu0.1
libmunge2 0.5.15-4ubuntu0.1
munge 0.5.15-4ubuntu0.1

Ubuntu 22.04 LTS
libmunge-dev 0.5.14-6ubuntu0.1
libmunge2 0.5.14-6ubuntu0.1
munge 0.5.14-6ubuntu0.1

Ubuntu 20.04 LTS
libmunge-dev 0.5.13-2ubuntu0.1~esm1
Available with Ubuntu Pro
libmunge2 0.5.13-2ubuntu0.1~esm1
Available with Ubuntu Pro
munge 0.5.13-2ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
libmunge-dev 0.5.13-1ubuntu0.1~esm1
Available with Ubuntu Pro
libmunge2 0.5.13-1ubuntu0.1~esm1
Available with Ubuntu Pro
munge 0.5.13-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
libmunge-dev 0.5.11-3ubuntu0.1+esm1
Available with Ubuntu Pro
libmunge2 0.5.11-3ubuntu0.1+esm1
Available with Ubuntu Pro
munge 0.5.11-3ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 14.04 LTS
libmunge-dev 0.5.11-1ubuntu1.1+esm1
Available with Ubuntu Pro
libmunge2 0.5.11-1ubuntu1.1+esm1
Available with Ubuntu Pro
munge 0.5.11-1ubuntu1.1+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8040-1
CVE-2026-25506

Package Information:
https://launchpad.net/ubuntu/+source/munge/0.5.16-1ubuntu0.1
https://launchpad.net/ubuntu/+source/munge/0.5.15-4ubuntu0.1
https://launchpad.net/ubuntu/+source/munge/0.5.14-6ubuntu0.1