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Fencer Vulns
high 7.7

CVE-2026-25506 json

MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery

published 2026-02-10 8 mo ago modified 2026-07-15 3 mo ago also EUVD-2026-6734

cvss
7.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:0.5.15-11.el10_1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:0.5.15-10.el10_0.1
  • Red Hat Red Hat Enterprise Linux 8 0:0.5.13-3.el8_10
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:0.5.13-1.el8_2.1
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:0.5.13-2.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:0.5.13-2.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:0.5.13-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:0.5.13-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:0.5.13-2.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:0.5.13-2.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:0.5.13-2.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 0:0.5.13-14.el9_7
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:0.5.13-13.el9_0.1
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:0.5.13-13.el9_2.1
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:0.5.13-13.el9_4.1
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:0.5.13-13.el9_6.1
  • Red Hat Red Hat AI Inference Server 3.3 1778244546
  • munge Debian 12 0.5.15-2+deb12u1
  • munge Debian 13 0.5.16-1.1~deb13u1
  • munge Debian 14 0.5.16-1.1

debian advisories DEBIAN-CVE-2026-25506

  • munge Ubuntu 22.04 LTS 0.5.14-6ubuntu0.1
  • munge Ubuntu 24.04 LTS 0.5.15-4ubuntu0.1
  • munge Ubuntu 25.10 0.5.16-1ubuntu0.1
  • munge Ubuntu Pro 14.04 LTS 0.5.11-1ubuntu1.1+esm1
  • munge Ubuntu Pro 16.04 LTS 0.5.11-3ubuntu0.1+esm1
  • munge Ubuntu Pro 18.04 LTS 0.5.13-1ubuntu0.1~esm1
  • munge Ubuntu Pro 20.04 LTS 0.5.13-2ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-25506

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • munge RHEL 10.1 0.5.15-11.el10_1
  • munge-libs RHEL 10.1 0.5.15-11.el10_1
  • munge RHEL 9 0.5.13-14.el9_7
  • munge-libs RHEL 9 0.5.13-14.el9_7
  • munge RHEL 8 0.5.13-3.el8_10
  • munge-libs RHEL 8 0.5.13-3.el8_10
  • munge RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 0.5.13-2.el8_6.1
  • munge-libs RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 0.5.13-2.el8_6.1

red hat advisories RHSA-2026:3033RHSA-2026:3034RHSA-2026:3032RHSA-2026:3013RHSA-2026:3011RHSA-2026:3012

  • munge SLES 15 SP6-LTSS, openSUSE Leap 15.6 0.5.15-150600.25.6.1
  • munge SLE Module for Package Hub 15 SP7, SLE Module for HPC 15 SP7 0.5.16-150700.3.6.1
  • munge SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS, SLE High Performance Computing 15 SP4-LTSS +1 more 0.5.15-150400.18.10.1
  • munge SLE Module for HPC 12 0.5.14-3.11.1

suse advisories SUSE-SU-2026:0484-1SUSE-SU-2026:0451-1SUSE-SU-2026:0450-1SUSE-SU-2026:0448-1

  • munge openSUSE Tumbleweed 0.5.18-1.1

opensuse advisories openSUSE-SU-2026:10178-1

  • munge AlmaLinux 8 0.5.13-3.el8_10
  • munge-libs AlmaLinux 8 0.5.13-3.el8_10
  • munge AlmaLinux 10 0.5.15-11.el10_1
  • munge-libs AlmaLinux 10 0.5.15-11.el10_1
  • munge AlmaLinux 9 0.5.13-14.el9_7
  • munge-libs AlmaLinux 9 0.5.13-14.el9_7

almalinux advisories ALSA-2026:3032ALSA-2026:3033ALSA-2026:3034

  • munge Rocky Linux 10 0.5.15-11.el10_1
  • munge Rocky Linux 9 0.5.13-14.el9_7
  • munge Rocky Linux 8 0.5.13-3.el8_10

rocky linux advisories RLSA-2026:3033RLSA-2026:3034RLSA-2026:3032

  • munge CBL-Mariner 2.0, Azure Linux 3.0 0.5.18-1

azure linux advisories AZL-77444AZL-77451

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-25506 updated cvss 7.7

MUNGE: MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery

  • Red Hat AI Inference Server 3.3 rhaiis 1778244546
    fixed: vendor fix RHSA-2026:16174
  • Red Hat CodeReady Linux Builder EUS (v.9.4) munge-devel 0.5.13-13.el9_4.1, munge-debuginfo 0.5.13-13.el9_4.1, munge-debugsource 0.5.13-13.el9_4.1, munge-libs-debuginfo 0.5.13-13.el9_4.1
    fixed: vendor fix RHSA-2026:2923
  • Red Hat CodeReady Linux Builder EUS (v.9.6) munge-devel 0.5.13-13.el9_6.1, munge-debuginfo 0.5.13-13.el9_6.1, munge-debugsource 0.5.13-13.el9_6.1, munge-libs-debuginfo 0.5.13-13.el9_6.1
    fixed: vendor fix RHSA-2026:2918
  • Red Hat Enterprise Linux AppStream (v. 8) munge 0.5.13-3.el8_10, munge-libs 0.5.13-3.el8_10
    fixed: vendor fix RHSA-2026:3032
  • Red Hat Enterprise Linux AppStream (v. 9) munge 0.5.13-14.el9_7, munge-libs 0.5.13-14.el9_7
    fixed: vendor fix RHSA-2026:3034
  • Red Hat Enterprise Linux AppStream (v. 10) munge 0.5.15-11.el10_1, munge-libs 0.5.15-11.el10_1
    fixed: vendor fix RHSA-2026:3033
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) munge 0.5.13-1.el8_2.1, munge-libs 0.5.13-1.el8_2.1
    fixed: vendor fix RHSA-2026:3011
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) munge 0.5.13-2.el8_4.1, munge-libs 0.5.13-2.el8_4.1
    fixed: vendor fix RHSA-2026:3010
show 14 more
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) munge 0.5.13-2.el8_6.1, munge-libs 0.5.13-2.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) munge 0.5.13-2.el8_6.1, munge-libs 0.5.13-2.el8_6.1
    fixed: vendor fix RHSA-2026:3013
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) munge 0.5.13-2.el8_8.1, munge-libs 0.5.13-2.el8_8.1
    fixed: vendor fix RHSA-2026:3012
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) munge 0.5.13-13.el9_0.1, munge-libs 0.5.13-13.el9_0.1
    fixed: vendor fix RHSA-2026:2949
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) munge 0.5.13-13.el9_2.1, munge-libs 0.5.13-13.el9_2.1
    fixed: vendor fix RHSA-2026:2934
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) munge 0.5.15-10.el10_0.1, munge-libs 0.5.15-10.el10_0.1
    fixed: vendor fix RHSA-2026:2954
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) munge 0.5.13-13.el9_4.1, munge-libs 0.5.13-13.el9_4.1
    fixed: vendor fix RHSA-2026:2923
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) munge 0.5.13-13.el9_6.1, munge-libs 0.5.13-13.el9_6.1
    fixed: vendor fix RHSA-2026:2918
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) munge 0.5.13-2.el8_4.1, munge-libs 0.5.13-2.el8_4.1
    fixed: vendor fix RHSA-2026:3010
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) munge 0.5.13-2.el8_6.1, munge-libs 0.5.13-2.el8_6.1
    fixed: vendor fix RHSA-2026:3013
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) munge 0.5.13-2.el8_8.1, munge-libs 0.5.13-2.el8_8.1
    fixed: vendor fix RHSA-2026:3012
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) munge-devel 0.5.13-14.el9_7, munge-debuginfo 0.5.13-14.el9_7, munge-debugsource 0.5.13-14.el9_7, munge-libs-debuginfo 0.5.13-14.el9_7
    fixed: vendor fix RHSA-2026:3034
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) munge-devel 0.5.15-11.el10_1, munge-debuginfo 0.5.15-11.el10_1, munge-debugsource 0.5.15-11.el10_1, munge-libs-debuginfo 0.5.15-11.el10_1
    fixed: vendor fix RHSA-2026:3033
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) munge-devel 0.5.15-10.el10_0.1, munge-debuginfo 0.5.15-10.el10_0.1, munge-debugsource 0.5.15-10.el10_0.1, munge-libs-debuginfo 0.5.15-10.el10_0.1
    fixed: vendor fix RHSA-2026:2954
  • Red Hat Enterprise Linux CRB (v. 8) munge-devel 0.5.13-3.el8_10, munge-debuginfo 0.5.13-3.el8_10, munge-debugsource 0.5.13-3.el8_10, munge-libs-debuginfo 0.5.13-3.el8_10
    fixed: vendor fix RHSA-2026:3032

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
8 mo ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
CISA ADP 3.1 7.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • dun munge
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat AI Inference Server 3.3

Classification

Weakness
  • CWE-787 Out-of-bounds Write
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.