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

CVE-2026-88838

Busybox: busybox: non-root mount option filter bypass allows clearing fstab security restrictions PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Red Hat / Red Hat Hardened Images	affected

CWE

CWE-693

References

https://access.redhat.com/security/cve/CVE-2026-88838
https://bugzilla.redhat.com/show_bug.cgi?id=2531352

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.