GHSA-52JH-GF9J-C2MQ

Vulnerability from github – Published: 2026-08-28 09:31 – Updated: 2026-08-28 09:31
VLAI
Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80627"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T08:16:46Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-52jh-gf9j-c2mq",
  "modified": "2026-08-28T09:31:47Z",
  "published": "2026-08-28T09:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80627"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}



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