CVE-2026-80627 (GCVE-0-2026-80627)
Vulnerability from cvelistv5
Published
2026-08-28 06:48
Modified
2026-08-28 06:48
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: MIPS: mm: Fix out-of-bounds write in maar_res_walk() maar_res_walk() uses wi->num_cfg as the index into the fixed-size wi->cfg array, but checks whether the array is full only after it has filled the selected entry. If walk_system_ram_range() reports more than 16 memory ranges, the overflow call writes one struct maar_config past the end of the array before WARN_ON() prevents num_cfg from advancing. Move the full-array check before taking the array slot and return non-zero when the scratch array is full, so walk_system_ram_range() terminates the walk instead of invoking the callback for further ranges.
References
Impacted products
Vendor Product Version
Linux Linux Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
Version: a5718fe8f70f33b1b5b47a153057cfdd19684598
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{
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          "programFiles": [
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      "cpeApplicability": [
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: mm: Fix out-of-bounds write in maar_res_walk()\n\nmaar_res_walk() uses wi-\u003enum_cfg as the index into the fixed-size\nwi-\u003ecfg array, but checks whether the array is full only after it has\nfilled the selected entry. If walk_system_ram_range() reports more than\n16 memory ranges, the overflow call writes one struct maar_config past\nthe end of the array before WARN_ON() prevents num_cfg from advancing.\n\nMove the full-array check before taking the array slot and return non-zero\nwhen the scratch array is full, so walk_system_ram_range() terminates the\nwalk instead of invoking the callback for further ranges."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-28T06:48:44.777Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de"
        },
        {
          "url": "https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd"
        },
        {
          "url": "https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074"
        },
        {
          "url": "https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560"
        },
        {
          "url": "https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce"
        }
      ],
      "title": "MIPS: mm: Fix out-of-bounds write in maar_res_walk()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80627",
    "datePublished": "2026-08-28T06:48:44.777Z",
    "dateReserved": "2026-08-26T14:34:25.775Z",
    "dateUpdated": "2026-08-28T06:48:44.777Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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