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CVE-2023-36476

`calamares-nixos-extensions` LUKS keyfile exposure

7.9 High

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
None

Exploit likelihood

0.26%Up 0.2 points since Jun 29, 2023
90%50%10%1%

What each source reports

CVE List Score used 7.9

`calamares-nixos-extensions` LUKS keyfile exposure

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.

Record
CVE-2023-36476
CVSS 3.1
7.9 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness
CWE-200
Updated
2026-11-02
EUVDEUVD-2023-40429 7.9

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.

Record
EUVD-2023-40429
CVSS 3.1
7.9 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Updated
2026-11-03
NVD 7.9

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.

Record
CVE-2023-36476
CVSS 3.1
7.9 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-200, CWE-522
Updated
2026-11-02
OSV 7.9

`calamares-nixos-extensions` LUKS keyfile exposure

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.

Record
CVE-2023-36476
CVSS 3.1
7.9 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
Weakness
CWE-200
Updated
2026-11-02

Affected products

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-36476 is a high vulnerability (CVSS 7.9) in Nixos Calamares-nixos-extensions, published June 29, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. No source names a fixed version.

References

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