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CVE-2026-108119

CVE-2026-108119 · Busybox: busybox: tar extraction-root escape via deferred symlink/hardlink creation bypasses cve-2026-26158 fix

This page contains facts from public vulnerability sources. Check the original advisory before updating.

A flaw was found in busybox. The tar applet's deferred link-creation handling for symlink and hardlink entries with unsafe-looking targets does not validate that the resolved destination remains inside the extraction directory once the deferred link is created. An attacker can craft a tar archive using a symlink target of exactly '..' combined with a deferred hardlink to create a new file outside the extraction directory, or reuse an extraction directory across two archives to replace an existing file outside it. If the archive is extracted with elevated privileges, this flaw can lead to privilege escalation or arbitrary code execution.

CVSS 6.3 · Medium · EPSS 0.1%

Published
Updated

Stack: system

Affected products and versions

  • red hat hardened images

    Versions
    • ≥ 1.37.0-9.4.hum1: Not affected (rpm)

    No fix published

  • red hat enterprise linux 6

    No fix published

  • busybox Debian:12

    Versions
    • 1:1.35.0-4
    • 1:1.35.0-4+deb12u1
    • 1:1.36.0-1~exp1
    • 1:1.36.1-1
    • 1:1.36.1-2
    • 1:1.36.1-3
    • 1:1.36.1-3.1
    • 1:1.36.1-4
    • 1:1.36.1-5
    • 1:1.36.1-6
    • 1:1.36.1-6~exp.1
    • 1:1.36.1-7
    • 1:1.36.1-8
    • 1:1.36.1-9
    • 1:1.37.0-1
    • 1:1.37.0-10
    • 1:1.37.0-10.1
    • 1:1.37.0-2
    • 1:1.37.0-3
    • 1:1.37.0-4
    • 1:1.37.0-5
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    • 1:1.38.0-1
    • 1:1.38.0-2
    • 1:1.38.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Debian:13

    Versions
    • 1:1.37.0-10
    • 1:1.37.0-10.1
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    • 1:1.38.0-1
    • 1:1.38.0-2
    • 1:1.38.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Debian:14

    Versions
    • 1:1.37.0-10
    • 1:1.37.0-10.1
    • 1:1.37.0-6
    • 1:1.37.0-7
    • 1:1.37.0-8
    • 1:1.37.0-9
    • 1:1.38.0-1
    • 1:1.38.0-2
    • 1:1.38.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:Pro:14.04:LTS

    Versions
    • 1:1.20.0-8.1ubuntu1
    • 1:1.20.0-9ubuntu1
    • 1:1.20.0-9ubuntu2
    • 1:1.21.0-1ubuntu1
    • 1:1.21.0-1ubuntu1.4
    • 1:1.21.0-1ubuntu1.4+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:Pro:16.04:LTS

    Versions
    • 1:1.22.0-15ubuntu1
    • 1:1.22.0-15ubuntu1.4
    • 1:1.22.0-15ubuntu1.4+esm1
    • 1:1.22.0-15ubuntu1.4+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:Pro:18.04:LTS

    Versions
    • 1:1.22.0-19ubuntu2
    • 1:1.27.2-1ubuntu3
    • 1:1.27.2-1ubuntu4
    • 1:1.27.2-2ubuntu2
    • 1:1.27.2-2ubuntu3
    • 1:1.27.2-2ubuntu3.1
    • 1:1.27.2-2ubuntu3.2
    • 1:1.27.2-2ubuntu3.3
    • 1:1.27.2-2ubuntu3.4
    • 1:1.27.2-2ubuntu3.4+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:20.04:LTS

    Versions
    • 1:1.30.1-4ubuntu4
    • 1:1.30.1-4ubuntu5
    • 1:1.30.1-4ubuntu6
    • 1:1.30.1-4ubuntu6.1
    • 1:1.30.1-4ubuntu6.2
    • 1:1.30.1-4ubuntu6.3
    • 1:1.30.1-4ubuntu6.4
    • 1:1.30.1-4ubuntu6.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:22.04:LTS

    Versions
    • 1:1.30.1-6ubuntu3
    • 1:1.30.1-7ubuntu1
    • 1:1.30.1-7ubuntu2
    • 1:1.30.1-7ubuntu3
    • 1:1.30.1-7ubuntu3.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:24.04:LTS

    Versions
    • 1:1.36.1-3ubuntu1
    • 1:1.36.1-6ubuntu1
    • 1:1.36.1-6ubuntu3
    • 1:1.36.1-6ubuntu3.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:26.10

    Versions
    • 1:1.37.0-7ubuntu1
    • 1:1.37.0-10.1ubuntu2
    • 1:1.37.0-10.1ubuntu3
    • 1:1.38.0-3ubuntu1
    • 1:1.38.0-3ubuntu3
    • 1:1.38.0-3ubuntu4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • busybox Ubuntu:26.04:LTS

    Versions
    • 1:1.37.0-4ubuntu1
    • 1:1.37.0-7ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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