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CVE-2026-88838

CVE-2026-88838 · Busybox: busybox: non-root mount option filter bypass allows clearing fstab security restrictions

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

A flaw was found in BusyBox's mount utility. A non-root user can bypass mount security restrictions set in /etc/fstab by specifying clearing-mask options on the command line. These options pass the non-root flag filter and are merged with fstab options as strings; when the combined options are re-parsed, clearing options can override nosuid, nodev, and noexec protections the administrator intended to enforce.

CVSS 5.5 · Medium · EPSS 0.1%

Published
Updated

Stack: system

Affected products and versions

  • red hat hardened images

    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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