Description
MUNGE is an authentication service for creating and validating user credentials. From 0.5 to 0.5.17, local attacker can exploit a buffer overflow vulnerability in munged (the MUNGE authentication daemon) to leak cryptographic key material from process memory. With the leaked key material, the attacker could forge arbitrary MUNGE credentials to impersonate any user (including root) to services that rely on MUNGE for authentication. The vulnerability allows a buffer overflow by sending a crafted message with an oversized address length field, corrupting munged's internal state and enabling extraction of the MAC subkey used for credential verification. This vulnerability is fixed in 0.5.18.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| dun | munge | >= 0.5, < 0.5.18 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | munge | 0.5.16-1.1 | — |
| Debian 13 | munge | 0.5.16-1.1~deb13u1 | DSA-6129-1 |
| Debian 12 | munge | 0.5.15-2+deb12u1 | DSA-6129-1 |
| Debian 11 | munge | 0.5.14-4+deb11u1 | DLA-4477-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | munge | 0.5.16-1ubuntu0.1 | USN-8040-1 |
| Ubuntu 24.04 LTS | munge | 0.5.15-4ubuntu0.1 | USN-8040-1 |
| Ubuntu 22.04 LTS | munge | 0.5.14-6ubuntu0.1 | USN-8040-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | munge | 0.5.13-2ubuntu0.1~esm1 | USN-8040-1 |
| Ubuntu Pro 18.04 LTS | munge | 0.5.13-1ubuntu0.1~esm1 | USN-8040-1 |
| Ubuntu Pro 16.04 LTS | munge | 0.5.11-3ubuntu0.1+esm1 | USN-8040-1 |
| Ubuntu Pro 14.04 LTS | munge | 0.5.11-1ubuntu1.1+esm1 | USN-8040-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | munge +2 | 0.5.15-11.el10_1 | RHSA-2026:3033 |
| RHEL 9 | munge +2 | 0.5.13-14.el9_7 | RHSA-2026:3034 |
| RHEL 8 | munge +2 | 0.5.13-3.el8_10 | RHSA-2026:3032 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | munge +2 | 0.5.15-10.el10_0.1 | RHSA-2026:2954 |
| RHEL 9.6 EUS | munge +2 | 0.5.13-13.el9_6.1 | RHSA-2026:2918 |
| RHEL 9.4 EUS | munge +2 | 0.5.13-13.el9_4.1 | RHSA-2026:2923 |
| RHEL 9.2 E4S | munge +1 | 0.5.13-13.el9_2.1 | RHSA-2026:2934 |
| RHEL 9.0 E4S | munge +1 | 0.5.13-13.el9_0.1 | RHSA-2026:2949 |
| RHEL 8.8 TUS | munge +1 | 0.5.13-2.el8_8.1 | RHSA-2026:3012 |
| RHEL 8.8 E4S | munge +1 | 0.5.13-2.el8_8.1 | RHSA-2026:3012 |
| RHEL 8.6 TUS | munge +1 | 0.5.13-2.el8_6.1 | RHSA-2026:3013 |
| RHEL 8.6 E4S | munge +1 | 0.5.13-2.el8_6.1 | RHSA-2026:3013 |
| RHEL 8.6 AUS | munge +1 | 0.5.13-2.el8_6.1 | RHSA-2026:3013 |
| RHEL 8.4 EUS Long Life | munge +1 | 0.5.13-2.el8_4.1 | RHSA-2026:3010 |
| RHEL 8.4 AUS | munge +1 | 0.5.13-2.el8_4.1 | RHSA-2026:3010 |
| RHEL 8.2 AUS | munge +1 | 0.5.13-1.el8_2.1 | RHSA-2026:3011 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | munge +2 | 0.5.15-11.el10_1 | ALSA-2026:3033 |
| AlmaLinux 9 | munge +2 | 0.5.13-14.el9_7 | ALSA-2026:3034 |
| AlmaLinux 8 | munge +2 | 0.5.13-3.el8_10 | ALSA-2026:3032 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | munge | 0.5.15-11.el10_1 | RLSA-2026:3033 |
| Rocky Linux 9 | munge | 0.5.13-14.el9_7 | RLSA-2026:3034 |
| Rocky Linux 8 | munge | 0.5.13-3.el8_10 | RLSA-2026:3032 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | munge | 0.5.16-150700.3.6.1 | SUSE-SU-2026:0451-1 |
| SLES 15 SP6 | munge | 0.5.15-150600.25.6.1 | SUSE-SU-2026:0484-1 |
| SLES 12 | munge | 0.5.14-3.11.1 | SUSE-SU-2026:0448-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLE HPC 15 SP5 | munge | 0.5.15-150400.18.10.1 | SUSE-SU-2026:0450-1 |
| SLE HPC 15 SP4 | munge | 0.5.15-150400.18.10.1 | SUSE-SU-2026:0450-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | munge | 0.5.18-1.1 | openSUSE-SU-2026:10178-1 |
| openSUSE Leap 15.6 | munge | 0.5.15-150600.25.6.1 | SUSE-SU-2026:0484-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | munge +2 | 0.5.14-7.amzn2023.0.5 | ALAS2023-2026-1453 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | munge | 0.5.18-1 | — |
| Azure Linux 2 (CBL-Mariner) | munge | 0.5.18-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | munge +2 | 0.5.15-11.el10_1 | ELSA-2026-3033 |
| Oracle Linux 9 | munge +2 | 0.5.13-14.0.1.el9_7 | ELSA-2026-3034 |
| Oracle Linux 8 | munge +2 | 0.5.13-3.el8_10 | ELSA-2026-3032 |
Advisories 31
- ALSA-2026:3033 Important: munge security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3034 Important: munge security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:3032 Important: munge security update AlmaLinux Security Advisories · Oct 29, 2026
- USN-8040-1 munge vulnerability Ubuntu Security Notices (USN) · Oct 27, 2026
- RHSA-2026:3034 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3032 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3033 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3013 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3012 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3011 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:3010 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2954 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2949 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2934 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2923 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2918 Red Hat Security Advisory: munge security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- openSUSE-SU-2026:10178-1 libmunge2-0.5.18-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2023-2026-1453 Important: munge security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2026
- WID-SEC-2026-0448 Red Hat Enterprise Linux (MUNGE): Schwachstelle ermöglicht Privilegieneskalation BSI CERT-Bund (WID) · Feb 24, 2026
- RLSA-2026:3032 Important: munge security update Rocky Linux Security Advisories · Feb 24, 2026
- RLSA-2026:3033 Important: munge security update Rocky Linux Security Advisories · Feb 24, 2026
- RLSA-2026:3034 Important: munge security update Rocky Linux Security Advisories · Feb 24, 2026
- ELSA-2026-3033 Important: munge security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Feb 23, 2026
- ELSA-2026-3034 Important: munge security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 23, 2026
- ELSA-2026-3032 Important: munge security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 23, 2026
- SUSE-SU-2026:0484-1 Security update for munge SUSE / openSUSE Security Updates · Feb 13, 2026
- SUSE-SU-2026:0450-1 Security update for munge SUSE / openSUSE Security Updates · Feb 12, 2026
- SUSE-SU-2026:0451-1 Security update for munge SUSE / openSUSE Security Updates · Feb 12, 2026
- SUSE-SU-2026:0448-1 Security update for munge SUSE / openSUSE Security Updates · Feb 12, 2026
- DSA-6129-1 munge - security update Debian Security (DSA / DLA) · Feb 10, 2026
- DLA-4477-1 munge - security update Debian Security (DSA / DLA) · Feb 10, 2026