{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/x86.c",
            "arch/x86/kvm/xen.c",
            "include/linux/kvm_host.h",
            "virt/kvm/pfncache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "61242001d6c9c253df7645dab090842d8da08764",
              "status": "affected",
              "version": "982ed0de4753ed6e71dbd40f82a5a066baf133ed",
              "versionType": "git"
            },
            {
              "lessThan": "52491a38b2c2411f3f0229dc6ad610349c704a41",
              "status": "affected",
              "version": "982ed0de4753ed6e71dbd40f82a5a066baf133ed",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/x86.c",
            "arch/x86/kvm/xen.c",
            "include/linux/kvm_host.h",
            "virt/kvm/pfncache.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.17"
            },
            {
              "lessThan": "5.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Initialize gfn_to_pfn_cache locks in dedicated helper\n\nMove the gfn_to_pfn_cache lock initialization to another helper and\ncall the new helper during VM/vCPU creation.  There are race\nconditions possible due to kvm_gfn_to_pfn_cache_init()\u0027s\nability to re-initialize the cache\u0027s locks.\n\nFor example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and\nkvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock.\n\n                (thread 1)                |           (thread 2)\n                                          |\n kvm_xen_set_evtchn_fast                  |\n  read_lock_irqsave(\u0026gpc-\u003elock, ...)      |\n                                          | kvm_gfn_to_pfn_cache_init\n                                          |  rwlock_init(\u0026gpc-\u003elock)\n  read_unlock_irqrestore(\u0026gpc-\u003elock, ...) |\n\nRename \"cache_init\" and \"cache_destroy\" to activate+deactivate to\navoid implying that the cache really is destroyed/freed.\n\nNote, there more races in the newly named kvm_gpc_activate() that will\nbe addressed separately.\n\n[sean: call out that this is a bug fix]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-01T14:10:30.589Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/61242001d6c9c253df7645dab090842d8da08764"
        },
        {
          "url": "https://git.kernel.org/stable/c/52491a38b2c2411f3f0229dc6ad610349c704a41"
        }
      ],
      "title": "KVM: Initialize gfn_to_pfn_cache locks in dedicated helper",
      "x_generator": {
        "engine": "bippy-1.1.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49884",
    "datePublished": "2025-05-01T14:10:30.589Z",
    "dateReserved": "2025-05-01T14:05:17.241Z",
    "dateUpdated": "2025-05-01T14:10:30.589Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49884\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:13.387\",\"lastModified\":\"2025-05-01T15:16:13.387\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nKVM: Initialize gfn_to_pfn_cache locks in dedicated helper\\n\\nMove the gfn_to_pfn_cache lock initialization to another helper and\\ncall the new helper during VM/vCPU creation.  There are race\\nconditions possible due to kvm_gfn_to_pfn_cache_init()\u0027s\\nability to re-initialize the cache\u0027s locks.\\n\\nFor example: a race between ioctl(KVM_XEN_HVM_EVTCHN_SEND) and\\nkvm_gfn_to_pfn_cache_init() leads to a corrupted shinfo gpc lock.\\n\\n                (thread 1)                |           (thread 2)\\n                                          |\\n kvm_xen_set_evtchn_fast                  |\\n  read_lock_irqsave(\u0026gpc-\u003elock, ...)      |\\n                                          | kvm_gfn_to_pfn_cache_init\\n                                          |  rwlock_init(\u0026gpc-\u003elock)\\n  read_unlock_irqrestore(\u0026gpc-\u003elock, ...) |\\n\\nRename \\\"cache_init\\\" and \\\"cache_destroy\\\" to activate+deactivate to\\navoid implying that the cache really is destroyed/freed.\\n\\nNote, there more races in the newly named kvm_gpc_activate() that will\\nbe addressed separately.\\n\\n[sean: call out that this is a bug fix]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/52491a38b2c2411f3f0229dc6ad610349c704a41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/61242001d6c9c253df7645dab090842d8da08764\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}