CVE-2026-25506MUNGE is an authentication service for creating and validating user credentials.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787, CWE-120
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Jul 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
opensuse munge opensuse:munge | from 0.5 before 0.5.18 | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://github.com/dun/munge/commit/bf40cc27c4ce8451d4b062c9de0b67ec40894812patch
- https://github.com/dun/munge/releases/tag/munge-0.5.18product, release-notes
- https://github.com/dun/munge/security/advisories/GHSA-r9cr-jf4v-75ghmitigation, patch, vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/02/10/3mailing-list, patch, third-party-advisory
- http://www.openwall.com/lists/oss-security/2026/02/17/6mailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2026/02/msg00015.htmlmailing-list, third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:16174
- https://access.redhat.com/errata/RHSA-2026:2918
- https://access.redhat.com/errata/RHSA-2026:2923
- https://access.redhat.com/errata/RHSA-2026:2934
- https://access.redhat.com/errata/RHSA-2026:2949
- https://access.redhat.com/errata/RHSA-2026:2954
- https://access.redhat.com/errata/RHSA-2026:3010
- https://access.redhat.com/errata/RHSA-2026:3011
- https://access.redhat.com/errata/RHSA-2026:3012
- https://access.redhat.com/errata/RHSA-2026:3013
- https://access.redhat.com/errata/RHSA-2026:3032
- https://access.redhat.com/errata/RHSA-2026:3033
- https://access.redhat.com/errata/RHSA-2026:3034
- https://access.redhat.com/security/cve/CVE-2026-25506
- https://bugzilla.redhat.com/show_bug.cgi?id=2438715
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25506.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.