CVE-2023-36476

Name: CVE-2023-36476
Creator: NVD / NIST
Published: 2023-06-29T01:15:51.267+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2023-36476 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. calamares-nixos-extensions provides Calamares branding and modules for NixOS, a distribution of GNU/Linux. Users of calamares-nixos-extensions version 0.3.12 and prior who installed NixOS through the graphical calamares installer, with an unencrypted `/boot`, on either non-UEFI systems or with a LUKS partition different from `/` have their LUKS key file in `/boot` as a plaintext CPIO archive attached to their NixOS initrd. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

calamares-nixos-extensions provides Calamares branding and modules for NixOS, a distribution of GNU/Linux. Users of calamares-nixos-extensions version 0.3.12 and prior who installed NixOS through the graphical calamares installer, with an unencrypted `/boot`, on either non-UEFI systems or with a LUKS partition different from `/` have their LUKS key file in `/boot` as a plaintext CPIO archive attached to their NixOS initrd. A patch is available and anticipated to be part of version 0.3.13 to backport to NixOS 22.11, 23.05, and unstable channels. Expert users who have a copy of their data may, as a workaround, re-encrypt the LUKS partition(s) themselves.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.25%

15.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nixos	Calamares-Nixos-Extensions	< 0.3.13

References

https://github.com/NixOS/calamares-nixos-extensions/security/advisories/GHSA-3rvf-24q2-24wwMitigation, Vendor Advisory
https://github.com/osresearch/heads/issues/1348Exploit, Issue Tracking
https://github.com/vlinkz/calamares-nixos-extensions/commit/837ca4da5521a74d3b5ca6f7b88890a6713faa22Patch
https://github.com/NixOS/calamares-nixos-extensions/security/advisories/GHSA-3rvf-24q2-24wwMitigation, Vendor Advisory
https://github.com/osresearch/heads/issues/1348Exploit, Issue Tracking
https://github.com/vlinkz/calamares-nixos-extensions/commit/837ca4da5521a74d3b5ca6f7b88890a6713faa22Patch

Timeline

Published: Jun 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-36476?

How severe is CVE-2023-36476?

CVE-2023-36476 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2023-36476?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-36476?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST