CVE-2026-110449

Integer overflow in NixOS

CVSS score

7.5

EPSS probability

—

Risk score

0.8

Published

4 h ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

CVE-2026-110449 – Integer Overflow in Nix/Lix

Sources read

Source agreement

Tam uyum

Evidence confidence

%61

Short explanation

Nix versions prior to 2.35.3 and Lix versions prior to 2.95.4 contain an integer overflow that can lead to an out‑of‑bounds write when evaluating untrusted expressions (CVSS 7.5, HIGH).

Why does it matter?

An attacker can exploit crafted Nix expressions to corrupt memory and potentially achieve code execution.

What should be done?

Follow the vendor security advisory
Upgrade to a version newer than the affected releases
Monitor official announcements as patch status is unknown

Note on uncertainty

The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.

Chain of evidence and sources3 verified claims

Nix ve Lix’in belirli sürümlerinde tamsayı taşması ve sınır dışı yazma hatası bulunur.

S0 · daybreach-canonical S1 · cvelist

Bu açık CISA KEV listesinde yer almıyor ve aktif istismar kanıtı bulunmamaktadır.

S0 · daybreach-canonical

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S0 · daybreach-canonical

Show the technical text from the sources

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.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L

CWE: CWE-190

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-110449 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	nixos	nix	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.5	CVSS V31	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L	NVD
7.5	CVSS V3_1	HIGH	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-110449 is associated with the following CWEs:

CWE-190: Integer Overflow or Wraparound

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-110449 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

UserGerekmiyor

Official Sources and Advisories

https://discourse.nixos.org/t/security-advisory-for-nix-and-lix-october-2026/80547vendor-advisory

CVSS Vector Radar Chart

7.5 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone required

User InteractionNone required

Confidentiality (Gizlilik)High

Integrity (Bütünlük)None

Availability (Erişilebilirlik)Low

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

nixos

Weakness Type (CWE & CAPEC)

CWE-190

Similar Vulnerabilities

9.8

CVE-2024-12084

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