CVE-2026-25506
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
MUNGE is an authentication service for creating and validating user credentials. From version 0.5 to 0.5.17, a 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.
Risk Assessment
The risk for the organization is that a local attacker could gain complete control over services authenticated by MUNGE, leading to unauthorized access to critical resources and privilege escalation.
Recommendation
Immediately update MUNGE to version 0.5.18 or later, which includes a fix for the buffer overflow vulnerability.
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Original NVD description (English source)
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.