{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5db1bef933427aa467ad89c7b695a84a6b4afe16"
            },
            {
              "fixed": "bd46b41f412fb81c50bac1a0929ec31320f3a807"
            },
            {
              "fixed": "f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb"
            },
            {
              "fixed": "a1b3c788ad31837e348075e93dbba3f447492776"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98637.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure\n\npkvm_vcpu_init_sve() clears KVM_ARM_VCPU_SVE in kvm-\u003earch.vcpu_features\nwhen it fails, but vcpu_has_sve() tests KVM_ARCH_FLAG_GUEST_HAS_SVE,\nwhich is left set. Later vCPUs on that VM then skip the SVE setup and\nregister with a NULL sve_state, which the guest's first FP access hands\nto sve_load_state().\n\nReturn the error without touching vcpu_features.",
  "id": "CVE-2026-98637",
  "modified": "2026-10-20T02:31:00.689991717Z",
  "published": "2026-10-18T15:20:08.157Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1b3c788ad31837e348075e93dbba3f447492776"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd46b41f412fb81c50bac1a0929ec31320f3a807"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f0cd8ffae092cc1b9d7cfa9188ed5a88a374adcb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98637.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98637"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "KVM: arm64: Do not clear VM-wide SVE feature on vCPU init failure"
}