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CVE-2026-44028 is a local privilege escalation vulnerability in Nix and Lix caused by unbounded recursion in the Nix Archive (NAR) parser. When parsing a maliciously crafted NAR containing deeply nested directory structures, the parser performs recursive calls on a coroutine stack allocated without a guard page. This allows stack exhaustion to overflow into adjacent heap memory, producing a stack-to-heap overflow and heap corruption. In multi-user deployments, the Nix/Lix daemon typically runs as root, so successful exploitation can result in arbitrary code execution in the daemon context. The issue was introduced in Nix 2.24.4 and Lix 2.93.0. Fixed versions are Nix 2.34.7, 2.33.6, 2.32.8, 2.31.5, 2.30.5, 2.29.4, and 2.28.7; and Lix 2.95.2, 2.94.2, and 2.93.4.
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No public exploit code observed for this vulnerability.
11 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
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