FKIE_CVE-2026-80627

Vulnerability from fkie_nvd - Published: 2026-08-28 08:16 - Updated: 2026-08-28 08:16
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/mm/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a594100e147a6a67eb29189170f1df3645cda12b",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "8b3e0c1c63015deaf084286899f5b2d0526715de",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "44c1d902cf0798b60762a7a98be992b9f5ded7dd",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "ac7385af1dca86a5ea704c80ca4dc822083ff9e2",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "431812eb88c200bc3ec33b88782c8cc415842074",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "92f38fe85198ace9b211bc7712b7951acfb94560",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "038f068cced8e9c49e8c419f3112d909ad366a3a",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            },
            {
              "lessThan": "1b001b16bc88f3f7817e228acfd91ee01bdcfcce",
              "status": "affected",
              "version": "a5718fe8f70f33b1b5b47a153057cfdd19684598",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/mm/init.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.4"
            },
            {
              "lessThan": "5.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-80627",
  "lastModified": "2026-08-28T08:16:46.867",
  "metrics": {},
  "published": "2026-08-28T08:16:46.867",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/038f068cced8e9c49e8c419f3112d909ad366a3a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1b001b16bc88f3f7817e228acfd91ee01bdcfcce"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/431812eb88c200bc3ec33b88782c8cc415842074"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/44c1d902cf0798b60762a7a98be992b9f5ded7dd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8b3e0c1c63015deaf084286899f5b2d0526715de"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/92f38fe85198ace9b211bc7712b7951acfb94560"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a594100e147a6a67eb29189170f1df3645cda12b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ac7385af1dca86a5ea704c80ca4dc822083ff9e2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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