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TI-2026-73869 Aliases CVE-2026-110449GHSA-5jjg-xg55-6mw3

Integer overflow in Nix and Lix list allocation enables out-of-bounds write

Priority LOW 32CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Nix before 2.35.3 and Lix before 2.95.4 contain an integer overflow (CWE-190) in list allocation. When either evaluates an untrusted expression, the overflow leads to an out-of-bounds write. A remote attacker without privileges can trigger it with high attack complexity and no user interaction, causing high integrity impact and low availability impact.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

Nix before 2.35.3 and Lix before 2.95.4 have an integer overflow and resultant out-of-bounds write when evaluating untrusted expressions because list allocation is mishandled.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00249 16th percentileScored 2026-11-07
Fix Fixed Nix (NixOS): 2.28.8, 2.30.6, 2.31.6 +2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NixOSNixbefore 2.28.8; 2.29.0 to before 2.30.6; 2.31.0 to before 2.31.6; 2.32.0 to before 2.34.9; 2.35.0 to before 2.35.32.28.8, 2.30.6, 2.31.6, 2.34.9, 2.35.3Patch availableCNA
  • Nix VendorNixOS Affected before 2.28.8; 2.29.0 to before 2.30.6; 2.31.0 to before 2.31.6; 2.32.0 to before 2.34.9; 2.35.0 to before 2.35.3 Fixed in 2.28.8, 2.30.6, 2.31.6, 2.34.9, 2.35.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:*——NixOS
  • cpe:2.3:a:nixos:nix:*:*:*:*:*:*:*:* Versions — — ·NixOS

Remediation

Upgrade Nix to 2.28.8, 2.30.6, 2.31.6, 2.34.9, or 2.35.3, matching the release line in use. Upgrade Lix to 2.95.4 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Nix (NixOS) Fixed in 2.28.8, 2.30.6, 2.31.6, 2.34.9, 2.35.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    NixOS Nix 2.28.8, 2.30.6 and 3 more versions

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-73870 Nix and Lix repair operation lets local users escalate privilegesPriority LOW 36
    • TI-2026-73873 Incorrect authorization in Nix lets build users reach daemon clientsPriority LOW 19
    • TI-2026-73871 Seatbelt sandbox escape in Nix and Lix builds on macOSPriority LOW 19
    Show all 5 records →

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110449
  2. 2026-10-14 Alias added: GHSA-5jjg-xg55-6mw3
  3. 2026-10-14 CISA SSVC decision points changed
  4. 2026-10-14 Priority changed: MEDIUM → LOW

References

Other 1

  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
  • TI-2024-11208 Rsync: heap buffer overflow in rsync due to improper checksum length handling CVSS 3.1CRITICAL 9.8
  • TI-2026-19201 Tandoor Recipes module allows SQLite database to be externally accessible with the default settings CVSS 4.0HIGH 8.7
  • TI-2024-11209 Rsync: info leak via uninitialized stack contents CVSS 3.1HIGH 7.5
  • TI-2024-11212 Rsync: --safe-links option bypass leads to path traversal CVSS 3.1HIGH 7.5
  • TI-2024-11211 Rsync: path traversal vulnerability in rsync CVSS 3.1HIGH 7.5
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences