CVE-2026-89912 KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/arm64/kvm/vgic/vgic-its.c"
    ],
    "versions": [
      {
        "version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
        "lessThan": "3d4c26b16a04a084fe0bde08ccdd8086570f8bbe",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
        "lessThan": "36df368861d2664291298feeb37dfef43fcae670",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
        "lessThan": "c6c156d931c33b92362383cf76f6d6e1291dcbfe",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/arm64/kvm/vgic/vgic-its.c"
    ],
    "versions": [
      {
        "version": "4.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.12",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "6.18.51",
        "lessThanOrEqual": "6.18.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.2.5",
        "lessThanOrEqual": "7.2.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "7.3-rc1",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]