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Details of issue NIXPKGS-2026-1226

NIXPKGS-2026-1226
published on
Permalink CVE-2026-6862
5.5 MEDIUM
  • CVSS version: 3.1
  • Attack vector (AV): LOCAL
  • Attack complexity (AC): LOW
  • Privileges required (PR): NONE
  • User interaction (UI): REQUIRED
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): NONE
  • Integrity impact (I): NONE
  • Availability impact (A): HIGH
updated 6 days, 11 hours ago by @LeSuisse Activity log
  • Created suggestion 6 days, 17 hours ago
  • @LeSuisse accepted 6 days, 11 hours ago
  • @LeSuisse published on GitHub 6 days, 11 hours ago
Efivar: efivar: denial of service due to stack overflow in device path node parsing

A flaw was found in libefiboot, a component of efivar. The device path node parser in libefiboot fails to validate that each node's Length field is at least 4 bytes, which is the minimum size for an EFI (Extensible Firmware Interface) device path node header. A local user could exploit this vulnerability by providing a specially crafted device path node. This can lead to infinite recursion, causing stack exhaustion and a process crash, resulting in a denial of service (DoS).

References

Affected products

rhcos
efivar

Matching in nixpkgs

pkgs.efivar

Tools and library to manipulate EFI variables

  • nixos-unstable 39
    • nixpkgs-unstable 39
    • nixos-unstable-small 39
  • nixos-25.11 39
    • nixos-25.11-small 39
    • nixpkgs-25.11-darwin 39