{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-53612",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-06-09T19:39:52.405Z",
        "datePublished": "2026-10-14T14:47:25.523Z",
        "dateUpdated": "2026-10-14T18:26:36.386Z"
    },
    "containers": {
        "cna": {
            "title": "util-linux mount hook_owner TOCTOU allows local privilege escalation",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-367",
                            "lang": "en",
                            "description": "CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "attackComplexity": "HIGH",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 7,
                        "baseSeverity": "HIGH",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "version": "3.1"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/commit/24da33905c7115c4cbccd0afb2a469804e96467a",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/commit/24da33905c7115c4cbccd0afb2a469804e96467a"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/commit/722c96974dd4009a334e4aee556eedaab5fb94b4",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/commit/722c96974dd4009a334e4aee556eedaab5fb94b4"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/commit/897a08c2b11dfa66975c3d24d63c7bf5f5be1a7c",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/commit/897a08c2b11dfa66975c3d24d63c7bf5f5be1a7c"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/commit/d0c5adaeb3a3d823aba1377794de8f009b8152cc",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/commit/d0c5adaeb3a3d823aba1377794de8f009b8152cc"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/releases/tag/v2.41.5"
                },
                {
                    "name": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/util-linux/util-linux/releases/tag/v2.42.2"
                }
            ],
            "affected": [
                {
                    "vendor": "util-linux",
                    "product": "util-linux",
                    "versions": [
                        {
                            "version": ">= 2.39, < 2.41.5",
                            "status": "affected"
                        },
                        {
                            "version": ">= 2.42, < 2.42.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-14T14:47:25.523Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "util-linux is a random collection of Linux utilities. In util-linux 2.39 through 2.41.4 and 2.42 through 2.42.1, the SUID `mount` utility's `hook_owner.c` post-mount hook performs path-based `chmod()` and `lchown()` operations on a previously validated mount target. A local low-privileged user authorized by an `/etc/fstab` entry with `user` or `users` and an `X-mount.mode`, `X-mount.owner`, or `X-mount.group` option can use `renameat2(RENAME_EXCHANGE)` to race a writable ancestor of the target and redirect the privileged ownership or mode change to a root-owned path, potentially gaining root privileges. This issue is fixed in 2.41.5 and 2.42.2."
                }
            ],
            "source": {
                "advisory": "GHSA-g8wm-75wr-g2vh",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/util-linux/util-linux/security/advisories/GHSA-g8wm-75wr-g2vh",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-14T18:24:31.298549Z",
                                "id": "CVE-2026-53612",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-14T18:26:36.386Z"
                }
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        ]
    }
}