{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-39725",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-04-16T07:20:57.117Z",
        "datePublished": "2025-09-05T17:27:18.719Z",
        "dateUpdated": "2026-05-23T16:00:35.031Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:00:35.031Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmscan: fix hwpoisoned large folio handling in shrink_folio_list\n\nIn shrink_folio_list(), the hwpoisoned folio may be large folio, which\ncan't be handled by unmap_poisoned_folio().  For THP, try_to_unmap_one()\nmust be passed with TTU_SPLIT_HUGE_PMD to split huge PMD first and then\nretry.  Without TTU_SPLIT_HUGE_PMD, we will trigger null-ptr deref of\npvmw.pte.  Even we passed TTU_SPLIT_HUGE_PMD, we will trigger a\nWARN_ON_ONCE due to the page isn't in swapcache.\n\nSince UCE is rare in real world, and race with reclaimation is more rare,\njust skipping the hwpoisoned large folio is enough.  memory_failure() will\nhandle it if the UCE is triggered again.\n\nThis happens when memory reclaim for large folio races with\nmemory_failure(), and will lead to kernel panic.  The race is as\nfollows:\n\ncpu0      cpu1\n shrink_folio_list memory_failure\n  TestSetPageHWPoison\n  unmap_poisoned_folio\n  --> trigger BUG_ON due to\n  unmap_poisoned_folio couldn't\n   handle large folio\n\n[tujinjiang@huawei.com: add comment to unmap_poisoned_folio()]"
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/memory-failure.c",
                        "mm/vmscan.c"
                    ],
                    "versions": [
                        {
                            "version": "1c9798bf8145a92abf45aa9d38a6406d9eb8bdf0",
                            "lessThan": "656eaddbc952e1baae2f69281c22debe22140312",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b0449544c6482179ac84530b61fc192a6527bfd",
                            "lessThan": "c1101113d45838a823188ae25c61af97552a28ae",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1b0449544c6482179ac84530b61fc192a6527bfd",
                            "lessThan": "9f1e8cd0b7c4c944e9921b52a6661b5eda2705ab",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "912e9f0300c3564b72a8808db406e313193a37ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.12.26",
                            "lessThan": "6.12.41",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.14.5",
                            "lessThan": "6.15",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/memory-failure.c",
                        "mm/vmscan.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.41",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.9",
                            "lessThanOrEqual": "6.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.16",
                            "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": "6.12.26",
                                    "versionEndExcluding": "6.12.41"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.15.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.16"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.14.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/656eaddbc952e1baae2f69281c22debe22140312"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c1101113d45838a823188ae25c61af97552a28ae"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f1e8cd0b7c4c944e9921b52a6661b5eda2705ab"
                }
            ],
            "title": "mm/vmscan: fix hwpoisoned large folio handling in shrink_folio_list",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}