CVE-2022-49054 (GCVE-0-2022-49054)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53
VLAI
Title
Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests
Summary
In the Linux kernel, the following vulnerability has been resolved: Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests hv_panic_page might contain guest-sensitive information, do not dump it over to Hyper-V by default in isolated guests. While at it, update some comments in hyperv_{panic,die}_event().
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a6c76bb08dc7f7ff2b1c381002eb6c7211746182 , < 1b576e81d31b56b248316b8ff816b1cc5c4407c7 (git)
Affected: a6c76bb08dc7f7ff2b1c381002eb6c7211746182 , < 6230bc50d6d21cae4c084766623d0a6d17958721 (git)
Affected: a6c76bb08dc7f7ff2b1c381002eb6c7211746182 , < 9f8b577f7b43b2170628d6c537252785dcc2dcea (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.35 , ≤ 5.15.* (semver)
Unaffected: 5.17.4 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hv/vmbus_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1b576e81d31b56b248316b8ff816b1cc5c4407c7",
              "status": "affected",
              "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
              "versionType": "git"
            },
            {
              "lessThan": "6230bc50d6d21cae4c084766623d0a6d17958721",
              "status": "affected",
              "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
              "versionType": "git"
            },
            {
              "lessThan": "9f8b577f7b43b2170628d6c537252785dcc2dcea",
              "status": "affected",
              "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hv/vmbus_drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.35",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.4",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests\n\nhv_panic_page might contain guest-sensitive information, do not dump it\nover to Hyper-V by default in isolated guests.\n\nWhile at it, update some comments in hyperv_{panic,die}_event()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The leak occurs over the Hyper-V guest crash MSR / panic-page interface between an isolated guest and its host, which is a local hypervisor channel rather than a network or physical attack path.\nAC:L - Whenever a panic occurs with the default-enabled sysctl, hv_kmsg_dump() reliably copies kmsg into hv_panic_page and notifies Hyper-V; no race, special memory layout, or other condition beyond the attacker\u2019s influence is required for the disclosure itself.\nPR:N - The adversarial party is the Hyper-V host outside the isolated guest\u2019s TCB and needs no privileges inside the guest; the guest kernel voluntarily exports the panic page on crash without authentication.\nUI:N - No victim user action is required; the dump runs automatically from the panic/kmsg_dump notifier path when the guest crashes.\nS:C - Isolated guests (SNP/VBS) treat the hypervisor as a separate security authority; disclosing guest kmsg to Hyper-V crosses that confidential-computing boundary, analogous to other guest-to-untrusted-VMM leaks scored with Scope Changed.\nC:H - Up to a full Hyper-V page of kernel log is shared with the host and may contain secrets, credentials, key material, and other sensitive guest data that confidential VMs are meant to withhold from the hypervisor.\nI:N - The bug only discloses existing kmsg contents to the host; it does not modify guest or host integrity or provide a write primitive.\nA:N - The vulnerability does not cause crashes or denial of service; it only improperly exports information when a panic has already occurred for other reasons."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:39.023Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1b576e81d31b56b248316b8ff816b1cc5c4407c7"
        },
        {
          "url": "https://git.kernel.org/stable/c/6230bc50d6d21cae4c084766623d0a6d17958721"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f8b577f7b43b2170628d6c537252785dcc2dcea"
        }
      ],
      "title": "Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49054",
    "datePublished": "2025-02-26T01:54:27.286Z",
    "dateReserved": "2025-02-26T01:49:39.243Z",
    "dateUpdated": "2026-08-05T08:53:39.023Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49054",
      "date": "2026-10-29",
      "epss": "0.003",
      "percentile": "0.22673"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/hv/vmbus_drv.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "1b576e81d31b56b248316b8ff816b1cc5c4407c7",
                    "status": "affected",
                    "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6230bc50d6d21cae4c084766623d0a6d17958721",
                    "status": "affected",
                    "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9f8b577f7b43b2170628d6c537252785dcc2dcea",
                    "status": "affected",
                    "version": "a6c76bb08dc7f7ff2b1c381002eb6c7211746182",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/hv/vmbus_drv.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.12"
                  },
                  {
                    "lessThan": "5.12",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.35",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.17.*",
                    "status": "unaffected",
                    "version": "5.17.4",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "5.18",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "25875113-6BB0-427F-9D95-EF6437399ACE",
                    "versionEndExcluding": "5.15.35",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "E22C86CB-06CD-4D16-AB2A-F21EE8199262",
                    "versionEndExcluding": "5.17.4",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "6AD94161-84BB-42E6-9882-4FC0C42E9FC1",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nDrivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests\n\nhv_panic_page might contain guest-sensitive information, do not dump it\nover to Hyper-V by default in isolated guests.\n\nWhile at it, update some comments in hyperv_{panic,die}_event()."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Controladores: hv: vmbus: Desactivar sysctl_record_panic_msg de forma predeterminada en invitados aislados hv_panic_page puede contener informaci\u00f3n confidencial del invitado; no la env\u00ede a Hyper-V de forma predeterminada en invitados aislados. Mientras tanto, actualice algunos comentarios en hyperv_{panic,die}_event()."
          }
        ],
        "id": "CVE-2022-49054",
        "lastModified": "2026-08-04T10:17:32.590",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "NONE",
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.5,
              "impactScore": 4.0,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-02-26T07:00:42.667",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1b576e81d31b56b248316b8ff816b1cc5c4407c7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/6230bc50d6d21cae4c084766623d0a6d17958721"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9f8b577f7b43b2170628d6c537252785dcc2dcea"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-30T01:06:42+00:00",
      "cve": "CVE-2022-49054",
      "id": "CVE-2022-49054",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "234",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Drivers: hv: vmbus: Deactivate sysctl_record_panic_msg by default in isolated guests",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49054.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.