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.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-02fa328deb advisory.

    - update to 2.31.4
    - fixes nix-daemon critical GHSA-g3g9-5vj6-r3gj (CVE-2026-39860)
    - https://github.com/NixOS/nix/security/advisories/GHSA-g3g9-5vj6-r3gj




Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-6c1a1c78c1 advisory.

    - update to 2.31.4
    - fixes nix-daemon critical GHSA-g3g9-5vj6-r3gj (CVE-2026-39860):
    - https://github.com/NixOS/nix/security/advisories/GHSA-g3g9-5vj6-r3gj





Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-8c7366e046 advisory.

    - update to 2.34
    - https://nix.dev/manual/nix/2.34/release-notes/rl-2.33.html
    - https://nix.dev/manual/nix/2.34/release-notes/rl-2.34.html
    - includes fix for nix-daemon critical GHSA-g3g9-5vj6-r3gj (CVE-2026-39860)
    - https://github.com/NixOS/nix/security/advisories/GHSA-g3g9-5vj6-r3gj






Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-39860)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
306854	Fedora 42 : nix (2026-02fa328deb)	Nessus	Fedora Local Security Checks	high
306853	Fedora 43 : nix (2026-6c1a1c78c1)	Nessus	Fedora Local Security Checks	high
306851	Fedora 44 : nix (2026-8c7366e046)	Nessus	Fedora Local Security Checks	high
305572	Linux Distros Unpatched Vulnerability : CVE-2026-39860	Nessus	Misc.	high

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