CVE-2021-22556 - Vulnerability Details - OpenCVE

The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

Access Vector Local

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00016.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Google	Fuchsia

Configuration 1 [-]

cpe:2.3:o:google:fuchsia:*:*:*:*:*:*:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2021-9697	The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don’t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://fuchsia-review.googlesource.com/c/fuchsia/+/570881
https://fuchsia.dev/whats-new/release-notes/f4-1

History

Mon, 21 Apr 2025 14:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

MITRE

Status: PUBLISHED

Assigner: Google

Published: 2022-05-03T15:50:11.000Z

Updated: 2025-04-21T13:54:07.544Z

Reserved: 2021-01-05T00:00:00.000Z

Link: CVE-2021-22556

Vulnrichment

Updated: 2024-08-03T18:44:13.719Z

NVD

Status : Modified

Published: 2022-05-03T16:15:18.627

Modified: 2024-11-21T05:50:19.533

Link: CVE-2021-22556

Redhat

No data.

OpenCVE Enrichment

No data.

{"containers": {"cna": {"affected": [{"product": "Fuchsia Kernel", "vendor": "Google LLC", "versions": [{"lessThan": "4.1", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "descriptions": [{"lang": "en", "value": "The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don\u2019t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond."}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2022-05-03T15:50:11.000Z", "orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://fuchsia.dev/whats-new/release-notes/f4-1"}, {"tags": ["x_refsource_MISC"], "url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881"}], "source": {"discovery": "INTERNAL"}, "title": "Integer Overflow in Fuchsia Kernel", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@google.com", "ID": "CVE-2021-22556", "STATE": "PUBLIC", "TITLE": "Integer Overflow in Fuchsia Kernel"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Fuchsia Kernel", "version": {"version_data": [{"version_affected": "<", "version_value": "4.1"}]}}]}, "vendor_name": "Google LLC"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don\u2019t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond."}]}, "generator": {"engine": "Vulnogram 0.0.9"}, "impact": {"cvss": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-190 Integer Overflow or Wraparound"}]}]}, "references": {"reference_data": [{"name": "https://fuchsia.dev/whats-new/release-notes/f4-1", "refsource": "MISC", "url": "https://fuchsia.dev/whats-new/release-notes/f4-1"}, {"name": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "refsource": "MISC", "url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881"}]}, "source": {"discovery": "INTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:44:13.719Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://fuchsia.dev/whats-new/release-notes/f4-1"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-04-21T13:36:25.693251Z", "id": "CVE-2021-22556", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-21T13:54:07.544Z"}}]}, "cveMetadata": {"assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "assignerShortName": "Google", "cveId": "CVE-2021-22556", "datePublished": "2022-05-03T15:50:11.000Z", "dateReserved": "2021-01-05T00:00:00.000Z", "dateUpdated": "2025-04-21T13:54:07.544Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://fuchsia.dev/whats-new/release-notes/f4-1", "tags": ["x_refsource_MISC", "x_transferred"]}, {"url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "tags": ["x_refsource_MISC", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T18:44:13.719Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-22556", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-04-21T13:36:25.693251Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-04-21T13:36:27.434Z"}}], "cna": {"title": "Integer Overflow in Fuchsia Kernel", "source": {"discovery": "INTERNAL"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "Google LLC", "product": "Fuchsia Kernel", "versions": [{"status": "affected", "version": "unspecified", "lessThan": "4.1", "versionType": "custom"}]}], "references": [{"url": "https://fuchsia.dev/whats-new/release-notes/f4-1", "tags": ["x_refsource_MISC"]}, {"url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "tags": ["x_refsource_MISC"]}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "descriptions": [{"lang": "en", "value": "The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don\u2019t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound"}]}], "providerMetadata": {"orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google", "dateUpdated": "2022-05-03T15:50:11.000Z"}, "x_legacyV4Record": {"impact": {"cvss": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, "source": {"discovery": "INTERNAL"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"version": {"version_data": [{"version_value": "4.1", "version_affected": "<"}]}, "product_name": "Fuchsia Kernel"}]}, "vendor_name": "Google LLC"}]}}, "data_type": "CVE", "generator": {"engine": "Vulnogram 0.0.9"}, "references": {"reference_data": [{"url": "https://fuchsia.dev/whats-new/release-notes/f4-1", "name": "https://fuchsia.dev/whats-new/release-notes/f4-1", "refsource": "MISC"}, {"url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "name": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "eng", "value": "The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don\u2019t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-190 Integer Overflow or Wraparound"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-22556", "STATE": "PUBLIC", "TITLE": "Integer Overflow in Fuchsia Kernel", "ASSIGNER": "security@google.com"}}}}, "cveMetadata": {"cveId": "CVE-2021-22556", "state": "PUBLISHED", "dateUpdated": "2025-04-21T13:54:07.544Z", "dateReserved": "2021-01-05T00:00:00.000Z", "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "datePublished": "2022-05-03T15:50:11.000Z", "assignerShortName": "Google"}, "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:google:fuchsia:*:*:*:*:*:*:*:*", "matchCriteriaId": "30CB1FE3-A9A9-43D7-9F7A-D5F2DB4DF462", "versionEndExcluding": "4.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "The Security Team discovered an integer overflow bug that allows an attacker with code execution to issue memory cache invalidation operations on pages that they don\u2019t own, allowing them to control kernel memory from userspace. We recommend upgrading to kernel version 4.1 or beyond."}, {"lang": "es", "value": "El equipo de seguridad detect\u00f3 un fallo de desbordamiento de enteros que permite a un atacante con ejecuci\u00f3n de c\u00f3digo emitir operaciones de no comprobaci\u00f3n de la cach\u00e9 de memoria en p\u00e1ginas que no posee, lo que le permite controlar la memoria del kernel desde el espacio de usuario. Es recomendado actualizar a la versi\u00f3n 4.1 del kernel o superior"}], "id": "CVE-2021-22556", "lastModified": "2024-11-21T05:50:19.533", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.6, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 4.2, "source": "cve-coordination@google.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-05-03T16:15:18.627", "references": [{"source": "cve-coordination@google.com", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881"}, {"source": "cve-coordination@google.com", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://fuchsia.dev/whats-new/release-notes/f4-1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://fuchsia.dev/whats-new/release-notes/f4-1"}], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}], "source": "cve-coordination@google.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-190"}], "source": "nvd@nist.gov", "type": "Primary"}]}