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FKIE_CVE-2026-92522

Vulnerability from fkie_nvd - Published: 2026-09-17 17:17 - Updated: 2026-09-17 17:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: ACPI: processor: validate MADT IOAPIC entry bounds The IOAPIC hotplug lookup parses both MADT and _MAT records directly. The MADT walk previously used a subtable's declared length to advance the cursor after only locating a generic header. The _MAT path likewise passed a generic header to the IOAPIC helper. Validate that a current record has a complete generic header, that its declared length is contained in the available record range, and that a typed IOAPIC record contains the full fixed IOAPIC body before reading its fields. Use the same relation for both MADT and _MAT provider paths.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/processor_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5601bd81bc290a724ed47797d22c16cba4d7ed9f",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "ff82e3374e9103d046b2a82f4315d9a422ff097d",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "2a5520065e76000f8c979d3d7b3d861ccaaecf1e",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "8e67b58c04990817ac2dbf8ae03353be6a358cd4",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "74d84320f8e37955eb286a7777843d554e6e75b2",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "4d8ecaa332c163f2b44aa5027bf061950b71b5f3",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "355bee5f11acb116cd256588631b4028ca562646",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            },
            {
              "lessThan": "2c50ffdc73f3a70d745d249f509fc290754121e6",
              "status": "affected",
              "version": "ecf5636dcd59cd5508641f995cc4c2bafedbb995",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/acpi/processor_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.0"
            },
            {
              "lessThan": "4.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nACPI: processor: validate MADT IOAPIC entry bounds\n\nThe IOAPIC hotplug lookup parses both MADT and _MAT records directly.\nThe MADT walk previously used a subtable\u0027s declared length to advance\nthe cursor after only locating a generic header.  The _MAT path likewise\npassed a generic header to the IOAPIC helper.\n\nValidate that a current record has a complete generic header, that its\ndeclared length is contained in the available record range, and that a\ntyped IOAPIC record contains the full fixed IOAPIC body before reading\nits fields.  Use the same relation for both MADT and _MAT provider\npaths."
    }
  ],
  "id": "CVE-2026-92522",
  "lastModified": "2026-09-17T17:17:55.150",
  "metrics": {},
  "published": "2026-09-17T17:17:55.150",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2a5520065e76000f8c979d3d7b3d861ccaaecf1e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2c50ffdc73f3a70d745d249f509fc290754121e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/355bee5f11acb116cd256588631b4028ca562646"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4d8ecaa332c163f2b44aa5027bf061950b71b5f3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5601bd81bc290a724ed47797d22c16cba4d7ed9f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/74d84320f8e37955eb286a7777843d554e6e75b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8e67b58c04990817ac2dbf8ae03353be6a358cd4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ff82e3374e9103d046b2a82f4315d9a422ff097d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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