Out-of-bounds write in MUNGE - CVE-2026-25506

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Main Vulnerability Database Vulnerabilities #VU122809

Out-of-bounds write in MUNGE - CVE-2026-25506

Published: February 13, 2026


Vulnerability identifier: #VU122809
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-25506
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary error. A local user can trigger an out-of-bounds write in the authentication daemon and force it to leak cryptographic key material from the process memory. The extracted information can be used to forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication.


Affected software

MUNGE
SUSE Linux Enterprise Server 15 SP6
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
HPC Module
Ubuntu
SUSE Package Hub 15
openSUSE Leap
openEuler
Fedora
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
munge (Ubuntu package)
munge (Red Hat package)
munge
munge-devel
munge-libs
munge-doc
munge-debugsource
munge-debuginfo
libmunge2-debuginfo
libmunge2
munge (Debian package)
libmunge2-32bit
libmunge2-32bit-debuginfo
libmunge2-64bit
munge-devel-64bit
libmunge2-64bit-debuginfo
munge-devel-32bit

How to mitigate CVE-2026-25506

Install updates from vendor's website.

MUNGE - update to 0.5.18
munge (Ubuntu package) - addressed in versions 0.5.11-1ubuntu1.1+esm1, 0.5.11-3ubuntu0.1+esm1, 0.5.13-1ubuntu0.1~esm1, 0.5.13-2ubuntu0.1~esm1, 0.5.14-6ubuntu0.1, 0.5.15-4ubuntu0.1, 0.5.16-1ubuntu0.1
munge (Red Hat package) - addressed in versions 0.5.13-1.el8_2.1, 0.5.13-2.el8_4.1, 0.5.13-2.el8_6.1, 0.5.13-2.el8_8.1, 0.5.13-3.el8_10, 0.5.13-13.el9_0.1, 0.5.13-13.el9_2.1, 0.5.13-13.el9_4.1, 0.5.13-13.el9_6.1, 0.5.13-14.el9_7, 0.5.15-10.el10_0.1, 0.5.15-11.el10_1
munge - addressed in versions 0.5.13-3.0.1, 0.5.15-2
munge-devel - addressed in versions 0.5.13-3.0.1, 0.5.15-2
munge-libs - addressed in versions 0.5.13-3.0.1, 0.5.15-2
munge-doc - addressed in versions 0.5.13-3.0.1, 0.5.15-2
munge - update to 0.5.14-2
munge-libs - update to 0.5.14-2
munge-devel - update to 0.5.14-2
munge-debugsource - update to 0.5.14-2
munge-debuginfo - update to 0.5.14-2
libmunge2-debuginfo - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
munge-devel - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
munge-debugsource - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
libmunge2 - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
munge - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
munge-debuginfo - addressed in versions 0.5.14-3.11.1, 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1, 0.5.16-150700.3.6.1
munge (Debian package) - addressed in versions 0.5.15-2+deb12u1, 0.5.16-1.1~deb13u1
libmunge2-32bit - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
libmunge2-32bit-debuginfo - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
libmunge2-64bit - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
munge-devel-64bit - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
libmunge2-64bit-debuginfo - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
munge-devel-32bit - addressed in versions 0.5.15-150400.18.10.1, 0.5.15-150600.25.6.1
munge - addressed in versions 0.5.18-1.fc42, 0.5.18-1.fc43

External References

Related Security Bulletins