Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Opensuse | Munge | >= 0.5, < 0.5.18 |
| Debian | Debian Linux | 11.0 |
Related Weaknesses (CWE)
References
- https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812Patch
- https://github.com/dun/munge/releases/tag/munge-0.5.18ProductRelease Notes
- https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75ghMitigationPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/02/10/3Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/02/17/6Mailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2026/02/msg00015.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2026-25506?
CVE-2026-25506 is a vulnerability with a CVSS score of 7.7 (HIGH). 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 daem...
How severe is CVE-2026-25506?
CVE-2026-25506 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-25506?
Check the references section above for vendor advisories and patch information. Affected products include: Opensuse Munge, Debian Debian Linux.