Executive Summary
Informations | |||
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Name | CVE-2022-42336 | First vendor Publication | 2023-05-17 |
Vendor | Cve | Last vendor Modification | 2023-11-07 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N | |||
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Overall CVSS Score | 3.3 | ||
Base Score | 3.3 | Environmental Score | 3.3 |
impact SubScore | 1.4 | Temporal Score | 3.3 |
Exploitabality Sub Score | 1.8 | ||
Attack Vector | Local | Attack Complexity | Low |
Privileges Required | Low | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | None |
Integrity Impact | Low | Availability Impact | None |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : | |||
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Cvss Base Score | N/A | Attack Range | N/A |
Cvss Impact Score | N/A | Attack Complexity | N/A |
Cvss Expoit Score | N/A | Authentication | N/A |
Calculate full CVSS 2.0 Vectors scores |
Detail
Mishandling of guest SSBD selection on AMD hardware The current logic to set SSBD on AMD Family 17h and Hygon Family 18h processors requires that the setting of SSBD is coordinated at a core level, as the setting is shared between threads. Logic was introduced to keep track of how many threads require SSBD active in order to coordinate it, such logic relies on using a per-core counter of threads that have SSBD active. When running on the mentioned hardware, it's possible for a guest to under or overflow the thread counter, because each write to VIRT_SPEC_CTRL.SSBD by the guest gets propagated to the helper that does the per-core active accounting. Underflowing the counter causes the value to get saturated, and thus attempts for guests running on the same core to set SSBD won't have effect because the hypervisor assumes it's already active. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42336 |
CPE : Common Platform Enumeration
Type | Description | Count |
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Os | 1 |
Sources (Detail)
Source | Url |
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MISC | https://xenbits.xenproject.org/xsa/advisory-431.txt |
Alert History
Date | Informations |
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2023-11-07 21:28:59 |
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2023-05-27 09:27:24 |
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2023-05-26 17:27:22 |
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2023-05-18 02:18:44 |
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2023-05-18 02:16:05 |
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2023-05-17 17:27:18 |
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2023-05-17 09:27:17 |
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