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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-78410",
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "state": "PUBLISHED",
        "assignerShortName": "redhat",
        "dateReserved": "2026-08-24T14:40:20.201Z",
        "datePublished": "2026-09-02T15:05:34.414Z",
        "dateUpdated": "2026-09-02T15:05:34.414Z"
    },
    "containers": {
        "cna": {
            "title": "Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.owner/group/mode redirection",
            "metrics": [
                {
                    "other": {
                        "content": {
                            "value": "Important",
                            "namespace": "https://access.redhat.com/security/updates/classification/"
                        },
                        "type": "Red Hat severity rating"
                    }
                },
                {
                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    },
                    "format": "CVSS"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "util-linux",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:10"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 7",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "util-linux",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:7"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "util-linux",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:8"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rhel8/flatpak-runtime",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:9"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rhel8/flatpak-sdk",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/o:redhat:enterprise_linux:9"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "util-linux",
                    "defaultStatus": "unaffected",
                    "cpes": [
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                },
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                    "product": "Red Hat Hardened Images",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "util-linux",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:hummingbird:1"
                    ]
                },
                {
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "rhcos",
                    "defaultStatus": "unaffected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:4"
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://access.redhat.com/security/cve/CVE-2026-78410",
                    "tags": [
                        "vdb-entry",
                        "x_refsource_REDHAT"
                    ]
                },
                {
                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2522684",
                    "name": "RHBZ#2522684",
                    "tags": [
                        "issue-tracking",
                        "x_refsource_REDHAT"
                    ]
                },
                {
                    "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-rh77-686x-2f2m"
                }
            ],
            "datePublic": "2026-09-02T00:00:00.000Z",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-367",
                            "description": "Time-of-check Time-of-use (TOCTOU) Race Condition",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "x_redhatCweChain": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
            "workarounds": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-06-18T00:00:00.000Z",
                    "value": "Reported to Red Hat."
                },
                {
                    "lang": "en",
                    "time": "2026-09-02T00:00:00.000Z",
                    "value": "Made public."
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Upstream acknowledges Zhuorao Yang (Huawei Cloud) as the original reporter."
                }
            ],
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