s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs

{
  "id": "c61ecdefdf9a2b2f6cf2bd3840c4ad2c89b73e1708e5c92ee70c9dd55fef18f2",
  "url": "https://osv.dev/vulnerability/CVE-2026-80709",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix wrong domain value verification with EP11 CPRBs There is a wrong upper limit check for the domain value when an EP11 CPRB is processed for sending to a crypto card. This check is only active on custom device nodes but may lead to access heap memory behind perms->adm when an administrative CPRB is sent. Add correct limit (AP_DOMAINS = 256) checking to fix this.",
    "evidence": "osv:CVE-2026-80709",
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    "severity": "high",
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      "modified": "2026-10-28T02:30:34.561110581Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1223477ca88e2396eca440919d0ca8754df79bd5",
        "https://git.kernel.org/stable/c/13e53d6ae1c3b2ff1be75b9ef09be26f4ec3ce15",
        "https://git.kernel.org/stable/c/4589f742718d0256ea6dd1f5a78be6e689bdb8aa",
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        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80709.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80709",
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  "source_id": "core-osv",
  "document_id": 502022,
  "published_at": "2026-08-28T06:53:09.439+00:00"
}