CVE-2021-26318
CVSS V2 Low 1.9
CVSS V3 Medium 4.7
Description
A timing and power-based side channel attack leveraging the x86 PREFETCH instructions on some AMD CPUs could potentially result in leaked kernel address space information.
Overview
- CVE ID
- CVE-2021-26318
- Assigner
- psirt@amd.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-10-13T19:15:07
- Last Modified Date
- 2021-10-20T18:29:12
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:athlon:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:athlon_pro:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:epyc:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:ryzen:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:amd:ryzen_pro:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:M/Au:N/C:P/I:N/A:N
- Access Vector
- LOCAL
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 1.9
- Severity
- LOW
- Exploitability Score
- 3.4
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- LOCAL
- Attack Compatibility
- HIGH
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 4.7
- Base Severity
- MEDIUM
- Exploitability Score
- 1
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017 | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-26318 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26318 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:50:17 | Added to TrackCVE | |||
| 2022-12-05 12:24:57 | 2021-10-13T19:15Z | 2021-10-13T19:15:07 | CVE Published Date | updated |
| 2022-12-05 12:24:57 | 2021-10-20T18:29:12 | CVE Modified Date | updated | |
| 2022-12-05 12:24:57 | Analyzed | Vulnerability Status | updated |