{"id":"CVE-2026-88838","title":"A flaw was found in BusyBox's mount utility","summary":"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 wit…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-693"],"vendor":"Red Hat","product":"busybox","affected":["busybox (all versions)"],"published":"2026-10-13","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:33:26.290","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88838","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-88838","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2531352","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88838.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-88838"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88838"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00113,"epssPercentile":0.01417,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-14T16:09:48.357357Z"},"ingestedAt":"2026-10-13T17:38:53.201Z","slug":"CVE-2026-88838","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-88838.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}