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DEBIAN-CVE-2026-44028

Type: advisorySource: OSV1 source record

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).

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-44028

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-44028

nix

Source reference: /affected/0/package/name

Affected versions
2.26.3+dfsg-1

Source reference: /affected/0/versions

2.32.5+dfsg-1

Source reference: /affected/0/versions

2.32.5+dfsg-2

Source reference: /affected/0/versions

2.34.3+dfsg-1

Source reference: /affected/0/versions

2.34.6+dfsg-1

Source reference: /affected/0/versions

2.34.8+dfsg-1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

nix

Source reference: /affected/1/package/name

Affected versions
2.26.3+dfsg-1

Source reference: /affected/1/versions

2.32.5+dfsg-1

Source reference: /affected/1/versions

2.32.5+dfsg-2

Source reference: /affected/1/versions

2.34.3+dfsg-1

Source reference: /affected/1/versions

2.34.6+dfsg-1

Source reference: /affected/1/versions

Fixed versions
2.34.8+dfsg-1

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "nix",
      "purl": "pkg:deb/debian/nix?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "2.26.3+dfsg-1",
      "2.32.5+dfsg-1",
      "2.32.5+dfsg-2",
      "2.34.3+dfsg-1",
      "2.34.6+dfsg-1",
      "2.34.8+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44028.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "2.34.8+dfsg-1"
          }
        ]
      }
    ],
    "package": {
      "name": "nix",
      "purl": "pkg:deb/debian/nix?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "2.26.3+dfsg-1",
      "2.32.5+dfsg-1",
      "2.32.5+dfsg-2",
      "2.34.3+dfsg-1",
      "2.34.6+dfsg-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-44028.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56543 · Revision 1
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Publisher date
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