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Ubuntu 22.04 LTS MUNGE Critical Buffer Overflow Threat CVE-2026-25506

ubuntu
Calendar Grey February 12, 2026
Dist Ubuntu Esm H88
Critical security issue in MUNGE could lead to system crashes or unauthorized program execution.
MUNGE could be made to crash or run programs as your login if it opened a specially crafted file.

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.

Topics%20covered

Topics Covered

security advisory buffer overflow critical arbitrary code execution Ubuntu munge

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

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8040-1

Topics%20covered

Topics Covered

security advisory buffer overflow critical arbitrary code execution Ubuntu munge

Package Information

https://launchpad.net/ubuntu/+source/munge/0.5.15-4ubuntu0.1

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