CVE-2026-25506
Severity CVSS v4.0:
Pending analysis
Type:
CWE-787
Out-of-bounds Write
Publication date:
10/02/2026
Last modified:
10/02/2026
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.
Impact
Base Score 3.x
7.70
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812
- https://github.com/dun/munge/releases/tag/munge-0.5.18
- https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75gh
- http://www.openwall.com/lists/oss-security/2026/02/10/3
- https://lists.debian.org/debian-lts-announce/2026/02/msg00015.html