CVE-2026-68124 mctp: serial: handle zero-length frames to prevent rx buffer overflow

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/mctp/mctp-serial.c"
    ],
    "versions": [
      {
        "version": "a0c2ccd9b5ad0a9e838158404e041b5a8ff762dd",
        "lessThan": "36dc6d6964a3b90411cc7944cd9b8b6f67b9807b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a0c2ccd9b5ad0a9e838158404e041b5a8ff762dd",
        "lessThan": "68819427bc07eca7963a9e8be19e5272cc29186c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a0c2ccd9b5ad0a9e838158404e041b5a8ff762dd",
        "lessThan": "f80ba170d7b3a44e3d244a2c8e06031d61bf3b23",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a0c2ccd9b5ad0a9e838158404e041b5a8ff762dd",
        "lessThan": "06a6b606129c8a25cd457760f5370f3ff01fe05d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a0c2ccd9b5ad0a9e838158404e041b5a8ff762dd",
        "lessThan": "793b9b729f1e8de57be8c8daf1a9838be96cabed",
        "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/net/mctp/mctp-serial.c"
    ],
    "versions": [
      {
        "version": "5.17",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.17",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.148",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.101",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.42",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.1.6",
        "lessThanOrEqual": "7.1.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2-rc5",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]