CVE-2025-59378

Build-user privilege escalation via evaluated mirror file

Published Sep 15, 2025 · Updated Sep 15, 2025

Code injection in guix-daemon before 1618ca7 allows local users to gain a build user's privileges via a crafted mirror file. The perform-download procedure evaluates arbitrary Guile code read from the user-controlled content-addressed-mirrors file while running as a build user. The resulting code can create a persistent setuid executable and manipulate outputs of builds executed by that build account.

CVSS severity5.7
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in guix-daemon before 1618ca7 allows local users to gain a build user's privileges via a crafted mirror file. The perform-download procedure evaluates arbitrary Guile code read from the user-controlled content-addressed-mirrors file while running as a build user. The resulting code can create a persistent setuid executable and manipulate outputs of builds executed by that build account.

The record

CVE
CVE-2025-59378
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The GnuPG Project
Product
GNU Guix
Classifications
CWE-669, T1548.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1618ca7aa2ee8b6519ee9fd0b965e15eca2bfe45

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The GnuPG Project · GNU Guixversion=0 <1618ca7aa2ee8b6519ee9fd0b965e15eca2bfe45

Published CVSS scores

5.7MITRECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-669Incorrect Resource Transfer Between Spheres
T1548.001Setuid and Setgid

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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