CVE-2026-44028

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CVE-2026-44028

CVSS score

7.5

EPSS probability

%0.2

Risk score

0.0

Published

5 mo ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-44028 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

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).

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-44028 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION

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:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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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-2026-44028 is associated with the following CWEs:

CWE-674: Common Weakness Enumeration Entry CWE-674

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-2026-44028 weaknesses.

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

Attack Vector and Accessibility

ExposureYerel erişim

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://discourse.nixos.org/t/security-advisory-local-privilege-escalation-in-lix-and-nix/77407nvd https://github.com/NixOS/nix/security/advisories/GHSA-vh5x-56v6-4368nvd https://lix.systems/blog/2026-05-05-lix-unsigned-integer-overflow/nvd https://www.openwall.com/lists/oss-security/2026/05/04/32nvd https://www.openwall.com/lists/oss-security/2026/05/04/33nvd

CVSS Vector Radar Chart

7.5 / 10

Vulnerability Scoring Details

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

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)High

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

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