CVE-2026-44028 (GCVE-0-2026-44028)

Vulnerability from cvelistv5 – Published: 2026-05-05 00:30 – Updated: 2026-05-05 14:13
VLAI?
Summary
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).
Severity ?
7.5 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
NixOS Nix Affected: 2.24.4 , < 2.28.7 (semver)
Affected: 2.29.0 , < 2.29.4 (semver)
Affected: 2.30.0 , < 2.30.5 (semver)
Affected: 2.31.0 , < 2.31.5 (semver)
Affected: 2.32.0 , < 2.32.8 (semver)
Affected: 2.33.0 , < 2.33.6 (semver)
Affected: 2.34.0 , < 2.34.7 (semver)
Create a notification for this product.
    Lix Project Lix Affected: 2.93.0 , < 2.93.4 (semver)
Affected: 2.94.0 , < 2.94.2 (semver)
Affected: 2.95.0 , < 2.95.2 (semver)
Create a notification for this product.
Show details on NVD website
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.