CVE-2025-39727 (GCVE-0-2025-39727)
Vulnerability from cvelistv5
Published
2025-09-07 15:16
Modified
2025-09-29 05:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm: swap: fix potential buffer overflow in setup_clusters() In setup_swap_map(), we only ensure badpages are in range (0, last_page]. As maxpages might be < last_page, setup_clusters() will encounter a buffer overflow when a badpage is >= maxpages. Only call inc_cluster_info_page() for badpage which is < maxpages to fix the issue.
References
Impacted products
Vendor Product Version
Linux Linux Version: b843786b0bd01ced7fcdbf3b033d68db2f7c61b2
Version: b843786b0bd01ced7fcdbf3b033d68db2f7c61b2
Version: b843786b0bd01ced7fcdbf3b033d68db2f7c61b2
Version: b843786b0bd01ced7fcdbf3b033d68db2f7c61b2
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{
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          "programFiles": [
            "mm/swapfile.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: swap: fix potential buffer overflow in setup_clusters()\n\nIn setup_swap_map(), we only ensure badpages are in range (0, last_page]. \nAs maxpages might be \u003c last_page, setup_clusters() will encounter a buffer\noverflow when a badpage is \u003e= maxpages.\n\nOnly call inc_cluster_info_page() for badpage which is \u003c maxpages to fix\nthe issue."
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      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:58:13.176Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "mm: swap: fix potential buffer overflow in setup_clusters()",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39727",
    "datePublished": "2025-09-07T15:16:17.986Z",
    "dateReserved": "2025-04-16T07:20:57.118Z",
    "dateUpdated": "2025-09-29T05:58:13.176Z",
    "state": "PUBLISHED"
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  }
}


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