{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-40218",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.179Z",
        "datePublished": "2025-12-04T14:50:41.873Z",
        "dateUpdated": "2026-05-11T21:45:03.319Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T21:45:03.319Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/vaddr: do not repeat pte_offset_map_lock() until success\n\nDAMON's virtual address space operation set implementation (vaddr) calls\npte_offset_map_lock() inside the page table walk callback function.  This\nis for reading and writing page table accessed bits.  If\npte_offset_map_lock() fails, it retries by returning the page table walk\ncallback function with ACTION_AGAIN.\n\npte_offset_map_lock() can continuously fail if the target is a pmd\nmigration entry, though.  Hence it could cause an infinite page table walk\nif the migration cannot be done until the page table walk is finished. \nThis indeed caused a soft lockup when CPU hotplugging and DAMON were\nrunning in parallel.\n\nAvoid the infinite loop by simply not retrying the page table walk.  DAMON\nis promising only a best-effort accuracy, so missing access to such pages\nis no problem."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/damon/vaddr.c"
                    ],
                    "versions": [
                        {
                            "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
                            "lessThan": "677ebfe5d00f94adec0c0204f6e6e2a82d3f77bf",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
                            "lessThan": "ac42320ec873bfe726141069cfdd90ee5bc4e885",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
                            "lessThan": "0ccd91cf749536d41307a07e60ec14ab0dbf21f5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7780d04046a2288ab85d88bedacc60fa4fad9971",
                            "lessThan": "b93af2cc8e036754c0d9970d9ddc47f43cc94b9f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/damon/vaddr.c"
                    ],
                    "versions": [
                        {
                            "version": "6.5",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.113",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.54",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.4",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.6.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.12.54"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.17.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5",
                                    "versionEndExcluding": "6.18"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/677ebfe5d00f94adec0c0204f6e6e2a82d3f77bf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ac42320ec873bfe726141069cfdd90ee5bc4e885"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0ccd91cf749536d41307a07e60ec14ab0dbf21f5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b93af2cc8e036754c0d9970d9ddc47f43cc94b9f"
                }
            ],
            "title": "mm/damon/vaddr: do not repeat pte_offset_map_lock() until success",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}