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Details of issue NIXPKGS-2026-0247

NIXPKGS-2026-0247
published 5 months, 1 week ago
Permalink CVE-2026-26158
7.0 HIGH
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Local (L)
  • Attack Complexity (AC): High (H)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): Required (R)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Local (L)
  • Modified Attack Complexity (MAC): High (H)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): Required (R)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
updated 5 months, 1 week ago by @LeSuisse Activity log
  • Created suggestion 5 months, 2 weeks ago
  • @LeSuisse ignored package gobusybox 5 months, 1 week ago
  • @LeSuisse accepted 5 months, 1 week ago
  • @LeSuisse published on GitHub 5 months, 1 week ago
Busybox: busybox: arbitrary file modification and privilege escalation via unvalidated tar archive entries

A flaw was found in BusyBox. This vulnerability allows an attacker to modify files outside of the intended extraction directory by crafting a malicious tar archive containing unvalidated hardlink or symlink entries. If the tar archive is extracted with elevated privileges, this flaw can lead to privilege escalation, enabling an attacker to gain unauthorized access to critical system files.

Affected products

busybox

Matching in nixpkgs

pkgs.busybox

Tiny versions of common UNIX utilities in a single small executable

Ignored packages (1) 
Upstream patch: https://git.busybox.net/busybox/commit/archival?id=3fb6b31c716669e12f75a2accd31bb7685b1a1cb