KVM: s390: pci: Fix NULL dereference on AIBV allocation failure

{
  "id": "499cedd5e9e938a21d27963f7dcc214c042fe9d4e9b56fb89452a3e410873937",
  "url": "https://osv.dev/vulnerability/CVE-2026-80684",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: s390: pci: Fix NULL dereference on AIBV allocation failure",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix NULL dereference on AIBV allocation failure The airq_iv_create() can return NULL on failure, but the return value was never checked. If it fails, zdev->aibv will be NULL and fail when dereferenced in kvm_zpci_set_airq(). Add a NULL check and free the previously allocated AISB bit and zdev->aisb on failure.",
    "evidence": "osv:CVE-2026-80684",
    "products": [
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        "name": {
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            "value": "6.1.183",
            "evidence": "/affected/1/ranges"
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            "value": "6.6.151",
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          {
            "value": "6.12.103",
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    "severity": "critical",
    "structured": {
      "id": "CVE-2026-80684",
      "aliases": [
        "CVE-2026-80684"
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      "metrics": [
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          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
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          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:31.004754438Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0a95abe964400771ad82b027d7b84a0d183cd0db",
        "https://git.kernel.org/stable/c/8bf09b9b7d3232806df95f409581f8a9fd99a3fa",
        "https://git.kernel.org/stable/c/96099486b63985801c9c6ef22505e9aa635b2d20",
        "https://git.kernel.org/stable/c/d1a103dc9016c25e7423ce5841a5cc2df76d59f3",
        "https://git.kernel.org/stable/c/df947d85e164a50a29d43a96e814f69ab1d0f7ed",
        "https://git.kernel.org/stable/c/e137d082325bbcae780087b57501d38585e625d9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80684.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-80684",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80684.json"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
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  "source_id": "core-osv",
  "document_id": 498184,
  "published_at": "2026-08-28T06:52:50.703+00:00"
}