{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-49883",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-15T21:29:37.620177Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-15T21:31:17.152Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/emulate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a7ebfbea0f52550d7cdf12c38f3f5eaa7b2b6494",
              "status": "affected",
              "version": "b443183a25ab61840a12de92f8822849e017b9c8",
              "versionType": "git"
            },
            {
              "lessThan": "696db303e54f7352623d9f640e6c51d8fa9d5588",
              "status": "affected",
              "version": "b443183a25ab61840a12de92f8822849e017b9c8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/emulate.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.8",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: smm: number of GPRs in the SMRAM image depends on the image format\n\nOn 64 bit host, if the guest doesn\u0027t have X86_FEATURE_LM, KVM will\naccess 16 gprs to 32-bit smram image, causing out-ouf-bound ram\naccess.\n\nOn 32 bit host, the rsm_load_state_64/enter_smm_save_state_64\nis compiled out, thus access overflow can\u0027t happen."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires local access to KVM (/dev/kvm ioctls) to create a non-LM guest with SMM, inject SMI, and execute RSM; it is not reachable via network packets.\nAC:L - An attacker who can use KVM fully controls CPUID (clearing X86_FEATURE_LM), SMM enablement, SMI injection, and RSM execution, so the OOB path is reliably triggerable with no race or uncontrolled condition.\nPR:L - Creating and running a KVM VM needs only access to /dev/kvm (kvm group or world-accessible on some distros), not real host root/CAP_SYS_ADMIN in the init namespace.\nUI:N - No separate victim action is required; the attacker drives the VM, injects SMI, and executes RSM themselves.\nS:U - The reliable impact is host-kernel stack disclosure into vCPU GPRs recovered via KVM_GET_REGS by host userspace, remaining within the same host OS security authority rather than a guest-observable VM escape.\nC:H - rsm_load_state_32() reads 16 bytes past em_rsm()\u0027s stack buf[512] (GET_SMSTATE offsets for GPRs 12\u201315) and writeback stores that host stack data into vCPU R12\u2013R15, which KVM_GET_REGS exposes (pointers/canaries possible).\nI:N - The bug is an out-of-bounds read only; corrupted values are written into in-bounds emulator/vCPU register slots, with no host memory write or control-flow hijack primitive.\nA:H - The out-of-bounds host stack access can fault into unmapped memory and oops/panic the host kernel, so availability impact is scored High."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:56:31.933Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a7ebfbea0f52550d7cdf12c38f3f5eaa7b2b6494"
        },
        {
          "url": "https://git.kernel.org/stable/c/696db303e54f7352623d9f640e6c51d8fa9d5588"
        }
      ],
      "title": "KVM: x86: smm: number of GPRs in the SMRAM image depends on the image format",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49883",
    "datePublished": "2025-05-01T14:10:29.804Z",
    "dateReserved": "2025-05-01T14:05:17.241Z",
    "dateUpdated": "2026-10-15T21:31:17.152Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}