UBUNTU-CVE-2026-44028

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Source
https://ubuntu.com/security/CVE-2026-44028
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44028.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-44028
Upstream
Published
2026-05-05T01:16:00Z
Modified
2026-05-20T16:13:26.031048019Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

An issue was discovered in Nix before 2.34.7 and Lix before 2.95.2. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users). The fixed versions are 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7 for Nix (introduced in 2.24.4); and 2.95.2, 2.94.2, and 2.93.4 for Lix (introduced in 2.93.0).

References

Affected packages

Ubuntu:Pro:22.04:LTS / nix

Package

Name
nix
Purl
pkg:deb/ubuntu/nix?arch=source&distro=esm-apps%2Fjammy

Affected ranges

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

Affected versions

2.*
2.3.10+dfsg1-1
2.3.10+dfsg1-1build1
2.6.0+dfsg-2
2.6.0+dfsg-3
2.6.0+dfsg-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.6.0+dfsg-3ubuntu0.1~esm1",
            "binary_name": "nix-bin"
        },
        {
            "binary_version": "2.6.0+dfsg-3ubuntu0.1~esm1",
            "binary_name": "nix-setup-systemd"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44028.json"

Ubuntu:Pro:24.04:LTS / nix

Package

Name
nix
Purl
pkg:deb/ubuntu/nix?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

2.*
2.16.1+dfsg-3ubuntu1
2.18.1+dfsg-1ubuntu1
2.18.1+dfsg-1ubuntu2
2.18.1+dfsg-1ubuntu4
2.18.1+dfsg-1ubuntu5
2.18.1+dfsg-1ubuntu5+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.18.1+dfsg-1ubuntu5+esm2",
            "binary_name": "nix-bin"
        },
        {
            "binary_version": "2.18.1+dfsg-1ubuntu5+esm2",
            "binary_name": "nix-setup-systemd"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44028.json"

Ubuntu:25.10 / nix

Package

Name
nix
Purl
pkg:deb/ubuntu/nix?arch=source&distro=questing

Affected ranges

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

Affected versions

2.*
2.24.9+dfsg-2ubuntu2
2.26.3+dfsg-1ubuntu1
2.26.3+dfsg-1ubuntu2
2.26.3+dfsg-1ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.26.3+dfsg-1ubuntu4",
            "binary_name": "nix-bin"
        },
        {
            "binary_version": "2.26.3+dfsg-1ubuntu4",
            "binary_name": "nix-setup-systemd"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44028.json"

Ubuntu:26.04:LTS / nix

Package

Name
nix
Purl
pkg:deb/ubuntu/nix?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.26.3+dfsg-1ubuntu4
2.26.3+dfsg-1ubuntu5
2.32.5+dfsg-1ubuntu3
2.32.5+dfsg-2ubuntu1
2.34.3+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.34.3+dfsg-1",
            "binary_name": "nix-bin"
        },
        {
            "binary_version": "2.34.3+dfsg-1",
            "binary_name": "nix-setup-systemd"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44028.json"