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CVE-2026-26158
7.0 HIGH
- CVSS version: 3.1
- Attack vector (AV): LOCAL
- Attack complexity (AC): HIGH
- Privileges required (PR): NONE
- User interaction (UI): REQUIRED
- Scope (S): UNCHANGED
- Confidentiality impact (C): HIGH
- Integrity impact (I): HIGH
- Availability impact (A): HIGH
Activity log
- Created suggestion
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.
References
Affected products
busybox
Matching in nixpkgs
pkgs.busybox
Tiny versions of common UNIX utilities in a single small executable
pkgs.gobusybox
Tools for compiling many Go commands into one binary to save space
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nixos-unstable 0.2.0-unstable-2024-03-05
- nixpkgs-unstable 0.2.0-unstable-2024-03-05
- nixos-unstable-small 0.2.0-unstable-2024-03-05
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nixos-25.11 0.2.0-unstable-2024-03-05
- nixpkgs-25.11-darwin 0.2.0-unstable-2024-03-05
pkgs.busybox-sandbox-shell
Tiny versions of common UNIX utilities in a single small executable
pkgs.minimal-bootstrap.busybox-static
Tiny versions of common UNIX utilities in a single small executable
Package maintainers
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@alyssais Alyssa Ross <hi@alyssa.is>
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@TethysSvensson Tethys Svensson <freaken@freaken.dk>
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@katexochen Paul Meyer <katexochen0@gmail.com>
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@emilytrau Emily Trau <emily+nix@downunderctf.com>
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@Ericson2314 John Ericson <John.Ericson@Obsidian.Systems>
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@alejandrosame Alejandro Sánchez Medina <alejandrosanchzmedina@gmail.com>
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@Gskartwii Aleksi Hannula <ahannula4@gmail.com>
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@pyrox0 Pyrox <pyrox@pyrox.dev>
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@06kellyjac Jack <hello+nixpkgs@j-k.io>
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@Artturin Artturi N <artturin@artturin.com>
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@siraben Siraphob Phipathananunth <bensiraphob@gmail.com>