CVE-2026-97423 (GCVE-0-2026-97423)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:03 – Updated: 2026-09-25 12:43
VLAI
Title
cxl/region: Validate partition index before array access
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: b6faa9c613787b894913638a76030018f6d62d54 , < 06322da06116f1ee52271dd4d84dc69580087df7 (git)
Affected: b6faa9c613787b894913638a76030018f6d62d54 , < 16329b510f76e5b824e05bf8add8b29850f1f16f (git)
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Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/cxl/core/region.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
            },
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            }
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      "cpeApplicability": [
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
            }
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      ],
      "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": {
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      }
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  },
  "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"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-09-25",
      "epss": "0.00155",
      "percentile": "0.0397"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
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                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/cxl/core/region.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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            ],
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          }
        ],
        "cveTags": [],
        "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."
          }
        ],
        "id": "CVE-2026-97423",
        "lastModified": "2026-09-25T13:17:25.867",
        "metrics": {},
        "published": "2026-09-24T17:17:20.227",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/06322da06116f1ee52271dd4d84dc69580087df7"
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          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:46:27Z",
      "cve": "CVE-2026-97423",
      "id": "CVE-2026-97423",
      "initial_release_date": "2026-09-24T23:46:27Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-97423",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-97423.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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