CVE-2026-31639 rxrpc: Fix key reference count leak from call->key

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/rxrpc/call_object.c"
    ],
    "versions": [
      {
        "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
        "lessThan": "f1a7a3ab0f35f83cf11bba906b9e948cf3788c28",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
        "lessThan": "e6b7943c5dc875647499da09bf4d50a8557ab0c3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
        "lessThan": "2e6ef713b1598f6acd7f302fa6b12b6731c89914",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
        "lessThan": "978108902ee4ef2b348ff7ec36ad014dc5bc6dc6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f3441d4125fc98995858550a5521b8d7daf0504a",
        "lessThan": "d666540d217e8d420544ebdfbadeedd623562733",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/rxrpc/call_object.c"
    ],
    "versions": [
      {
        "version": "6.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.2",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.6.135",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.12.82",
        "lessThanOrEqual": "6.12.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.23",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.19.13",
        "lessThanOrEqual": "6.19.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.0",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]