DEBIAN-CVE-2026-39860

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Source
https://security-tracker.debian.org/tracker/CVE-2026-39860
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39860.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-39860
Upstream
  • CVE-2026-39860
Published
2026-04-08T21:17:00.157Z
Modified
2026-04-09T09:00:49.989088Z
Severity
  • 9.0 (Critical) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
Summary
[none]
Details

Nix is a package manager for Linux and other Unix systems. A bug in the fix for CVE-2024-27297 allowed for arbitrary overwrites of files writable by the Nix process orchestrating the builds (typically the Nix daemon running as root in multi-user installations) by following symlinks during fixed-output derivation output registration. This affects sandboxed Linux builds - sandboxed macOS builds are unaffected. The location of the temporary output used for the output copy was located inside the build chroot. A symlink, pointing to an arbitrary location in the filesystem, could be created by the derivation builder at that path. During output registration, the Nix process (running in the host mount namespace) would follow that symlink and overwrite the destination with the derivation's output contents. In multi-user installations, this allows all users able to submit builds to the Nix daemon (allowed-users - defaulting to all users) to gain root privileges by modifying sensitive files. This vulnerability is fixed in 2.34.5, 2.33.4, 2.32.7, 2.31.4, 2.30.4, 2.29.3, and 2.28.6.

References

Affected packages

Debian:11 / nix

Package

Name
nix
Purl
pkg:deb/debian/nix?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.3.7+dfsg1-1
2.3.10+dfsg1-1
2.6.0+dfsg-1
2.6.0+dfsg-2
2.6.0+dfsg-3
2.7.0+dfsg-1
2.7.0+dfsg-2
2.7.0+dfsg-3
2.7.0+dfsg-4
2.7.0+dfsg-5
2.8.0-1
2.8.0-1.1
2.16.1+dfsg-1
2.16.1+dfsg-2
2.16.1+dfsg-3
2.17.1+dfsg-1
2.18.1+dfsg-1
2.22.1+dfsg-1
2.23.3+dfsg-1
2.23.3+dfsg-2
2.24.8+dfsg-1
2.24.9+dfsg-1
2.24.9+dfsg-2
2.24.12+dfsg-1
2.25.4+dfsg-1
2.26.3+dfsg-1
2.32.5+dfsg-1
2.32.5+dfsg-2
2.34.3+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39860.json"

Debian:12 / nix

Package

Name
nix
Purl
pkg:deb/debian/nix?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.8.0-1.1
2.16.1+dfsg-1
2.16.1+dfsg-2
2.16.1+dfsg-3
2.17.1+dfsg-1
2.18.1+dfsg-1
2.22.1+dfsg-1
2.23.3+dfsg-1
2.23.3+dfsg-2
2.24.8+dfsg-1
2.24.9+dfsg-1
2.24.9+dfsg-2
2.24.12+dfsg-1
2.25.4+dfsg-1
2.26.3+dfsg-1
2.32.5+dfsg-1
2.32.5+dfsg-2
2.34.3+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39860.json"

Debian:13 / nix

Package

Name
nix
Purl
pkg:deb/debian/nix?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.26.3+dfsg-1
2.32.5+dfsg-1
2.32.5+dfsg-2
2.34.3+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39860.json"

Debian:14 / nix

Package

Name
nix
Purl
pkg:deb/debian/nix?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.26.3+dfsg-1
2.32.5+dfsg-1
2.32.5+dfsg-2
2.34.3+dfsg-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39860.json"