CVE-2026-25506 (GCVE-0-2026-25506)

Vulnerability from cvelistv5 – Published: 2026-02-10 18:55 – Updated: 2026-07-15 01:16
VLAI
Title
MUNGE has a buffer overflow in message unpacking allows key leakage and credential forgery
Summary
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.
Severity
7.7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-787 - Out-of-bounds Write
  • CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
URL Tags
https://github.com/dun/munge/security/advisories/… x_refsource_CONFIRM
https://github.com/dun/munge/commit/bf40cc27c4ce8… x_refsource_MISC
https://github.com/dun/munge/releases/tag/munge-0.5.18 x_refsource_MISC
http://www.openwall.com/lists/oss-security/2026/02/10/3
https://lists.debian.org/debian-lts-announce/2026…
http://www.openwall.com/lists/oss-security/2026/02/17/6
https://access.redhat.com/security/cve/CVE-2026-25506 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2438715 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:2954 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3033 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3032 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3011 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3010 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3013 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3012 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2949 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2934 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2923 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:2918 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3034 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:16174 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
dun munge Affected: >= 0.5, < 0.5.18
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Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:0.5.15-11.el10_1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.1
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Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support Unaffected: 0:0.5.15-10.el10_0.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:0.5.13-3.el8_10 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support Unaffected: 0:0.5.13-1.el8_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Unaffected: 0:0.5.13-2.el8_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.4
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Unaffected: 0:0.5.13-2.el8_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus_long_life:8.4
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Unaffected: 0:0.5.13-2.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_aus:8.6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service Unaffected: 0:0.5.13-2.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Unaffected: 0:0.5.13-2.el8_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service Unaffected: 0:0.5.13-2.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_tus:8.8
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Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Unaffected: 0:0.5.13-2.el8_8.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:8.8
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Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:0.5.13-14.el9_7 , < * (rpm)
    cpe:/a:redhat:enterprise_linux:9
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Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions Unaffected: 0:0.5.13-13.el9_0.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.0
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Unaffected: 0:0.5.13-13.el9_2.1 , < * (rpm)
    cpe:/a:redhat:rhel_e4s:9.2
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support Unaffected: 0:0.5.13-13.el9_4.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.4
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support Unaffected: 0:0.5.13-13.el9_6.1 , < * (rpm)
    cpe:/a:redhat:rhel_eus:9.6
 Create a notification for this product.
Red Hat Red Hat AI Inference Server 3.3 Unaffected: 1778244546 , < * (rpm)
    cpe:/a:redhat:ai_inference_server:3.3::el9
 Create a notification for this product.
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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.