CVE-2026-88838
Busybox: busybox: non-root mount option filter bypass allows clearing fstab security restrictions
- State
- Published
- Severity
- 5.5 Medium
- Published
- Oct 13, 2026
- Updated
- Oct 14, 2026
- Reserved
- Sep 10, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | redhat |
Weaknesses
- CWE-693 Protection Mechanism Failure
Affected Products
| Product | Versions |
|---|---|
Red Hat Hardened ImagesRed Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-88838vdb-entry
- RHBZ#2531352issue-tracking
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