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CVE-2025-40089 cxl/features: Add check for no entries in cxl_feature_info

🗓️ 30 Oct 2025 09:47:57Reported by LinuxType 
cvelist
 cvelist
🔗 www.cve.org👁 7 Views

Fix crash by checking cxlfs before dereferencing cxl_feature_info and returning operation not supported when no hardware support.

Related
Affected
Refs
[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/cxl/core/features.c"
    ],
    "versions": [
      {
        "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
        "lessThan": "b8a69e3b1a460bf5d96dd53cbd121aa2cd346886",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eb5dfcb9e36d0e46089fec777d911313c1876fa3",
        "lessThan": "a375246fcf2bbdaeb1df7fa7ee5a8b884a89085e",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/cxl/core/features.c"
    ],
    "versions": [
      {
        "version": "6.15",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.15",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.17.5",
        "lessThanOrEqual": "6.17.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]

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