{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"util-linux","product":"Red Hat Enterprise Linux 10","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:2.40.2-18.el10_2.20","versionType":"rpm"}]},{"defaultStatus":"affected","ecosystem":"https://catalog.redhat.com/software/containers/","packageName":"util-linux-main","product":"Red Hat Hardened Images","source":"CNA: redhat","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"2.42.2-3.4.hum1","versionType":"rpm"}]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"util-linux","product":"Red Hat Enterprise Linux 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"util-linux","product":"Red Hat Enterprise Linux 8","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhel8/flatpak-runtime","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhel8/flatpak-sdk","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"util-linux","product":"Red Hat Enterprise Linux 9","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift/ose-rhel-coreos-8","product":"Red Hat OpenShift Container Platform 4","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift/ose-rhel-coreos-9","product":"Red Hat OpenShift Container Platform 4","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"openshift/ose-rhel-coreos-9","product":"Red Hat OpenShift Container Platform 5","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-78410","cwes":["CWE-367"],"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.","epss":{"date":"2026-11-01","percentile":0.05346,"score":0.00162},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"}],"kev":null,"metrics":[{"score":7.8,"severity":"high","source":"CNA: redhat","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793596571799,"publishedAt":1788361534414,"references":[{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:63162"},{"source":"CNA: redhat","tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:93461"},{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-78410"},{"source":"CNA: redhat","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2522684"},{"source":"CNA: redhat","tags":[],"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Upgrade to util-linux v2.41.6, v2.42.3, or later. Until a fix is applied, do not allow unprivileged /etc/fstab bind or rbind entries that also specify X-mount.owner, X-mount.group, or X-mount.mode, especially when the bind source is below a user-writable ancestor."}],"revision":"9c604f5a0b5dccdbbe524e16196d1bec2b5b460c69bc3961c21fae6b3c4f27bc","sources":[{"modifiedAt":1793596571799,"name":"CNA: redhat","retrievedAt":1793599718230,"url":"https://www.cve.org/CVERecord?id=CVE-2026-78410"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793599719946,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-78410"}],"ssvc":{"assessedAt":1788547384874,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection","updatedAt":1793599719946}