CVE-2021-22556

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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://fuchsia-review.googlesource.com/c/fuchsia/+/570881	Issue Tracking Patch Third Party Advisory
https://fuchsia.dev/whats-new/release-notes/f4-1	Release Notes Vendor Advisory

Configurations

Configuration 1 (hide)

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

Information

Published : 2022-05-03 09:15

Updated : 2022-05-10 16:56

NVD link : CVE-2021-22556

Mitre link : CVE-2021-22556

JSON object : View

CWE

CWE-190

Integer Overflow or Wraparound

Products Affected

google

fuchsia

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "name": "https://fuchsia-review.googlesource.com/c/fuchsia/+/570881", "tags": ["Issue Tracking", "Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://fuchsia.dev/whats-new/release-notes/f4-1", "name": "https://fuchsia.dev/whats-new/release-notes/f4-1", "tags": ["Release Notes", "Vendor Advisory"], "refsource": "MISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-190"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-22556", "ASSIGNER": "security@google.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 4.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}}, "publishedDate": "2022-05-03T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:google:fuchsia:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.1"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-05-10T23:56Z"}

7.8 /10