{"schemaVersion":3,"id":"CVE-2026-78410","aliases":["ALPINE-CVE-2026-78410","UBUNTU-CVE-2026-78410","DEBIAN-CVE-2026-78410"],"status":"published","duplicateOf":null,"title":null,"description":"A flaw was found in util-linux. Restricted bind mounts take the source path from fstab but do not pin that source before the privileged mount. A local unprivileged user who can replace the authorized source or a writable ancestor can redirect SUID mount(8) to bind another host directory. If the fstab entry also sets X-mount.owner, X-mount.group, or X-mount.mode, root then changes ownership or mode on that redirected inode.","dates":{"published":"2026-09-02T15:05:34.414Z","modified":"2026-09-04T18:43:10.663Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":4.6,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.8,"severity":"high","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00156,"percentile":0.0432,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.06,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00096},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00135,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00135,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00156,"percentile":0.0432}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00096,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00135,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00135,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00156,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00156,"percentile":0.0432}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition","description":"The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/367.html"}],"affected":[{"vendor":"alpine","product":"util-linux","name":"util-linux","label":"util-linux","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/util-linux","purlType":"apk","versions":[{"text":"< 2.41.6-r0","noFixRecorded":false,"fixedIn":null},{"text":"< 2.42.3-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.41.6-r0 | < 2.42.3-r0","eol":null,"hubHref":null},{"vendor":"debian","product":"util-linux","name":"util-linux","label":"util-linux","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/util-linux","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 2.42.3-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 2.42.3-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"util-linux","name":"util-linux","label":"util-linux","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/util-linux","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:63162","label":"access.redhat.com/errata/RHSA-2026:63162","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-78410","label":"access.redhat.com/security/cve/CVE-2026-78410","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT","REPORT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2522684","label":"bugzilla.redhat.com/show_bug.cgi?id=2522684","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT","REPORT"]},{"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m","label":"github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m","hostname":"github.com","tags":["REPORT"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-78410","label":"security.alpinelinux.org/vuln/CVE-2026-78410","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-78410","label":"ubuntu.com/security/CVE-2026-78410","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-78410","label":"www.cve.org/CVERecord?id=CVE-2026-78410","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-78410","label":"security-tracker.debian.org/tracker/CVE-2026-78410","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78410","label":"nvd.nist.gov/vuln/detail/CVE-2026-78410","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:11870-1","OPENSUSE-SU-2026:21905-1","RHSA-2026:63162","SUSE-SU-2026:23861-1","SUSE-SU-2026:23870-1","SUSE-SU-2026:23884-1"],"duplicates":["CVE-2026-104886"],"related":["OPENSUSE-SU-2026:11870-1","OPENSUSE-SU-2026:21905-1","SUSE-SU-2026:23861-1","SUSE-SU-2026:23870-1","SUSE-SU-2026:23884-1"]},"timeline":[{"kind":"published","date":"2026-09-02T15:05:34.414Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-04T18:43:10.663Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":31,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T12:48:56.773Z","stale":false,"partial":false}}