irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed

{
  "id": "bdc8c400d4a835c770af0af27ce3e2d478bd319686b28b3c9f6eb92122e28770",
  "url": "https://osv.dev/vulnerability/CVE-2026-98877",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v4: Don't advertise VLPIs if no ITS is probed When accidentally setting “kvm-arm.vgic_v4_enable=1” on a system that has no MSI controller device tree node and GICv4, it results a panic as “gic_domain” is NULL and the kernel attempts to access it. Unable to handle kernel NULL pointer dereference at virtual address 0000000000000028 Mem abort info: ESR = 0x0000000096000006 CPU: 1 UID: 0 PID: 295 Comm: lkvm-static Not tainted 7.1.0-rc4-ge3f15ad3970e #5 PREEMPT Hardware name: linux,dummy-virt (DT) pstate: 81402005 (Nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) pc : __irq_domain_instantiate+0x1d4/0x578 lr : __irq_domain_instantiate+0x1cc/0x578 Set vLPI support to false at init time if the host has no ITS, so it propagates properly to kvm_vgic_global_state.has_gicv4.",
    "evidence": "osv:CVE-2026-98877",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "value": "6.12.111",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.53",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
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    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98877",
      "aliases": [
        "CVE-2026-98877"
      ],
      "affected": [
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            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:28.164388510Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3e4cae9f1472ba3c9fe87edee24074618b51f537",
        "https://git.kernel.org/stable/c/4761493dd663443f7353c184e6fa16e1cb3ac5a1",
        "https://git.kernel.org/stable/c/a2508b8855acc96abe69be73b41b672f1ef12516",
        "https://git.kernel.org/stable/c/ab233119a19716b8f33e73ea7e092e0eb353cfbf",
        "https://git.kernel.org/stable/c/c8a911b3b07baa0aeb3dbc4e16a4670bd21bed40",
        "https://git.kernel.org/stable/c/e61654fbc3bc5d07ec9fafe29f33e19b2b5d0fd5",
        "https://git.kernel.org/stable/c/e79934064be85fc9a3a6434da857307d8b78e33d",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98877.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98877",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98877.json"
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    "related_cves": [
      {
        "value": "CVE-2026-98877",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494935,
  "published_at": "2026-10-23T11:37:23.678+00:00"
}