CVE-2026-97423 (GCVE-0-2026-97423)
Vulnerability from cvelistv5
Published
2026-09-24 16:03
Modified
2026-09-25 12:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Validate partition index before array access construct_region() reads cxled->part and uses it to index cxlds->part[] without checking for a negative value. If the partition was never resolved, part remains at its initial value of -1, causing an out-of-bounds array access. Add a guard to return -EBUSY when part is negative. The check was dropped during a merge.
References
Impacted products
Vendor Product Version
Linux Linux Version: b6faa9c613787b894913638a76030018f6d62d54
Version: b6faa9c613787b894913638a76030018f6d62d54
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/region.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "06322da06116f1ee52271dd4d84dc69580087df7",
              "status": "affected",
              "version": "b6faa9c613787b894913638a76030018f6d62d54",
              "versionType": "git"
            },
            {
              "lessThan": "16329b510f76e5b824e05bf8add8b29850f1f16f",
              "status": "affected",
              "version": "b6faa9c613787b894913638a76030018f6d62d54",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/region.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Validate partition index before array access\n\nconstruct_region() reads cxled-\u003epart and uses it to index\ncxlds-\u003epart[] without checking for a negative value. If the\npartition was never resolved, part remains at its initial value\nof -1, causing an out-of-bounds array access.\n\nAdd a guard to return -EBUSY when part is negative.\n\nThe check was dropped during a merge."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-25T12:43:59.015Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/06322da06116f1ee52271dd4d84dc69580087df7"
        },
        {
          "url": "https://git.kernel.org/stable/c/16329b510f76e5b824e05bf8add8b29850f1f16f"
        }
      ],
      "title": "cxl/region: Validate partition index before array access",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97423",
    "datePublished": "2026-09-24T16:03:35.458Z",
    "dateReserved": "2026-09-24T14:53:16.868Z",
    "dateUpdated": "2026-09-25T12:43:59.015Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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