CVE catalog

CVE-2026-110449

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.

[CVE catalog]

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:L
Published: Oct 14, 2026, 4:18:17 AM UTC
Updated: Oct 14, 2026, 4:18:17 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.25% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	nix	sid	`2.34.8+dfsg-1`	vulnerable
Debian	nix	forky	`2.34.8+dfsg-1`	vulnerable
Debian	nix	trixie	`2.26.3+dfsg-1`	vulnerable
Debian	nix	bookworm	`2.8.0-1.1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	nix	source	sid	`(unfixed)`	not yet assigned	Not reported	[1151197]
Debian	nix	source	forky	`(unfixed)`	not yet assigned	Not reported	[1151197]
Debian	nix	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1151197]
Debian	nix	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1151197]

[Debian bug #1151197]

Notes

[trixie] nix: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[nix-bin]Affected
Source package: [nix]
Details (2)
- 2.8.0-1.1 · arm64 · bookworm
  Affected
  nvd · nix · debian · bookworm; nvd · nix · debian · 12
- 2.8.0-1.1+b1 · amd64 · bookworm
  Affected
  nvd · nix · debian · bookworm; nvd · nix · debian · 12
[nix-setup-systemd]Affected
Source package: [nix]
Details (2)
- 2.8.0-1.1 · all · bookworm
  Affected
  nvd · nix · debian · bookworm; nvd · nix · debian · 12
- 2.8.0-1.1 · all · bookworm
  Affected
  nvd · nix · debian · bookworm; nvd · nix · debian · 12

[Debian 13 (Trixie)]

[nix-bin]Affected
Source package: [nix]
Details (2)
- 2.26.3+dfsg-1 · amd64 · trixie
  Affected
  nvd · nix · debian · 13
- 2.26.3+dfsg-1 · arm64 · trixie
  Affected
  nvd · nix · debian · 13
[nix-setup-systemd]Affected
Source package: [nix]
Details (2)
- 2.26.3+dfsg-1 · all · trixie
  Affected
  nvd · nix · debian · 13
- 2.26.3+dfsg-1 · all · trixie
  Affected
  nvd · nix · debian · 13

Observed: Oct 24, 2026, 9:56:06 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]