CVE-2026-88838
Busybox: busybox: non-root mount option filter bypass allows clearing fstab security restrictions
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-693 |
| Vendor | red hat |
| Product | red hat hardened images |
| Published | Oct 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Hardened Images
All versions affected References
Credits
Red Hat would like to thank Shubham Raj (Causal Security) for reporting this issue.