7.5

CVE-2026-44028: lix_project lix Uncontrolled Recursion

CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2026-44028DEBIAN-CVE-2026-44028openSUSE-SU-2026:10696-1
Published 05-05-2026Last modified 09-05-2026
Open JSON

Vulnerability summary

CVE-2026-44028 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in lix_project lix. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.18%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4
RHSA-2026:10208RHSA-2026:10999RHSA-2026:7046RHSA-2026:9438

Timeline

  1. 05-05-2026
    PublishedVulnerability first disclosed.
  2. 09-05-2026
    Last modifiedVulnerability information updated.

Description

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).

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • nixAll versions (No fix recorded) | < 2.34.8+dfsg-1
Lix_project1 product
  • lix≥ 2.93.0, < 2.93.4 | ≥ 2.94.0, < 2.94.2 | ≥ 2.95.0, < 2.95.2
Nixos1 product
  • nix≥ 2.24.4, < 2.28.7 | ≥ 2.29.0, < 2.29.4 | ≥ 2.30.0, < 2.30.5 | ≥ 2.31.0, < 2.31.5 | ≥ 2.32.0, < 2.32.8 | ≥ 2.33.0, < 2.33.6 | ≥ 2.34.0, < 2.34.7
Opensuse1 product
  • nix&distro=openSUSE Tumbleweed< 2.34.7-1.1
Ubuntu1 product
  • nixAll versions (No fix recorded)

5 vendors · 5 products

References

9 links