CVE-2026-88838

NameCVE-2026-88838
DescriptionA 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.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
busybox (PTS)bookworm1:1.35.0-4+deb12u1vulnerable
trixie1:1.37.0-6vulnerable
forky, sid1:1.38.0-3vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
busyboxsource(unstable)(unfixed)

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=2531352

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