CVE-2026-25506

HIGH EPSS 18.9%
Published Feb 10, 20264mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Feb 10, 2026 4mo ago
Last Modified Jun 17, 2026 1w ago

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 Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
18.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-787 Out-of-bounds Write Memory Safety

Affected Products 2

VendorProductVersionRange
opensusemunge*≥0.5  –  <0.5.18
debiandebian_linux11.0any

References 6

  • openwall.com http://www.openwall.com/lists/oss-security/2026/02/10/3
    Mailing ListPatchThird Party Advisory
  • openwall.com http://www.openwall.com/lists/oss-security/2026/02/17/6
    Mailing ListThird Party Advisory
  • github.com https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812
    Patch
  • github.com https://github.com/dun/munge/releases/tag/munge-0.5.18
    ProductRelease Notes
  • github.com https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75gh
    MitigationPatchVendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2026/02/msg00015.html
    Mailing ListThird Party Advisory

Remediation

  • openwall.com http://www.openwall.com/lists/oss-security/2026/02/10/3
    Mailing ListPatchThird Party Advisory
  • github.com https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812
    Patch
  • github.com https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75gh
    MitigationPatchVendor Advisory