Bug 2438715 (CVE-2026-25506) - CVE-2026-25506 MUNGE: MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery
Summary: CVE-2026-25506 MUNGE: MUNGE has a buffer overflow in message unpacking allows...
Keywords:
Status: NEW
Alias: CVE-2026-25506
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL: https://github.com/dun/munge/security...
Whiteboard:
Depends On: 2438832 2438833 2438926 2438927 2438928 2438929 2438930 2438931 2438932 2438933 2438934
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-10 20:03 UTC by OSIDB Bzimport
Modified: 2026-02-19 17:24 UTC (History)
34 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:2918 0 None None None 2026-02-18 12:02:04 UTC
Red Hat Product Errata RHSA-2026:2923 0 None None None 2026-02-18 12:57:43 UTC
Red Hat Product Errata RHSA-2026:2934 0 None None None 2026-02-18 13:21:48 UTC
Red Hat Product Errata RHSA-2026:2949 0 None None None 2026-02-18 14:21:24 UTC
Red Hat Product Errata RHSA-2026:2954 0 None None None 2026-02-18 14:59:18 UTC
Red Hat Product Errata RHSA-2026:3010 0 None None None 2026-02-19 16:43:27 UTC
Red Hat Product Errata RHSA-2026:3011 0 None None None 2026-02-19 15:46:46 UTC
Red Hat Product Errata RHSA-2026:3012 0 None None None 2026-02-19 16:17:37 UTC
Red Hat Product Errata RHSA-2026:3013 0 None None None 2026-02-19 16:18:37 UTC

Description OSIDB Bzimport 2026-02-10 20:03:09 UTC 
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.
Comment 6 David 2026-02-17 10:54:24 UTC 
It looks like this has been patched in v0.5.18 https://github.com/dun/munge/releases/tag/munge-0.5.18 should we expect this to be back ported to RHEL 8.10 which uses v0.5.13?
Comment 8 errata-xmlrpc 2026-02-18 12:02:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:2918 https://access.redhat.com/errata/RHSA-2026:2918
Comment 9 errata-xmlrpc 2026-02-18 12:57:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Extended Update Support

Via RHSA-2026:2923 https://access.redhat.com/errata/RHSA-2026:2923
Comment 10 errata-xmlrpc 2026-02-18 13:21:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:2934 https://access.redhat.com/errata/RHSA-2026:2934
Comment 11 errata-xmlrpc 2026-02-18 14:21:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:2949 https://access.redhat.com/errata/RHSA-2026:2949
Comment 12 errata-xmlrpc 2026-02-18 14:59:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:2954 https://access.redhat.com/errata/RHSA-2026:2954
Comment 13 errata-xmlrpc 2026-02-19 15:46:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2026:3011 https://access.redhat.com/errata/RHSA-2026:3011
Comment 14 errata-xmlrpc 2026-02-19 16:17:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:3012 https://access.redhat.com/errata/RHSA-2026:3012
Comment 15 errata-xmlrpc 2026-02-19 16:18:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2026:3013 https://access.redhat.com/errata/RHSA-2026:3013
Comment 16 errata-xmlrpc 2026-02-19 16:43:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:3010 https://access.redhat.com/errata/RHSA-2026:3010
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