CVE catalog
CVE-2026-88838
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 no
- Severity
- Medium · CVSS 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.11% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | busybox | sid | 1:1.38.0-3 | vulnerable |
| Debian | busybox | forky | 1:1.38.0-3 | vulnerable |
| Debian | busybox | trixie | 1:1.37.0-6 | vulnerable |
| Debian | busybox | bookworm | 1:1.35.0-4+deb12u1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | busybox | source | sid | (unfixed) | not yet assigned | Not reported | [1150940] |
| Debian | busybox | source | forky | (unfixed) | not yet assigned | Not reported | [1150940] |
| Debian | busybox | source | trixie | (unfixed) | not yet assigned | Not reported | [1150940] |
| Debian | busybox | source | bookworm | (unfixed) | not yet assigned | Not reported | [1150940] |
Notes
[trixie] busybox: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [busybox]Affected
Source package: [busybox]
Details (2)
1:1.35.0-4+deb12u1+b1· amd64 · bookwormAffected
nvd · busybox · debian · bookworm
1:1.35.0-4+deb12u1+b1· arm64 · bookwormAffected
nvd · busybox · debian · bookworm
- [busybox-static]Affected
Source package: [busybox]
Details (2)
1:1.35.0-4+deb12u1+b1· amd64 · bookwormAffected
nvd · busybox · debian · bookworm
1:1.35.0-4+deb12u1+b1· arm64 · bookwormAffected
nvd · busybox · debian · bookworm
- [busybox-syslogd]Affected
Source package: [busybox]
Details (2)
1:1.35.0-4+deb12u1· all · bookwormAffected
nvd · busybox · debian · bookworm
1:1.35.0-4+deb12u1· all · bookwormAffected
nvd · busybox · debian · bookworm
- [udhcpc]Affected
Source package: [busybox]
Details (2)
1:1.35.0-4+deb12u1+b1· amd64 · bookwormAffected
nvd · busybox · debian · bookworm
1:1.35.0-4+deb12u1+b1· arm64 · bookwormAffected
nvd · busybox · debian · bookworm
- [udhcpd]Affected
Source package: [busybox]
Details (2)
1:1.35.0-4+deb12u1+b1· amd64 · bookwormAffected
nvd · busybox · debian · bookworm
1:1.35.0-4+deb12u1+b1· arm64 · bookwormAffected
nvd · busybox · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-88838]
- [https://security-tracker.debian.org/tracker/CVE-2026-88838]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88838.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3914.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]