Vulnerability Details : CVE-2021-26318
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.
Products affected by CVE-2021-26318
- cpe:2.3:o:amd:ryzen_pro_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:ryzen_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:athlon_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:athlon_pro_firmware:-:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_firmware:-:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-26318
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 28 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-26318
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
1.9
|
LOW | AV:L/AC:M/Au:N/C:P/I:N/A:N |
3.4
|
2.9
|
NIST | |
|
4.7
|
MEDIUM | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
1.0
|
3.6
|
NIST |
CWE ids for CVE-2021-26318
-
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: nvd@nist.gov (Primary)
-
Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.Assigned by: psirt@amd.com (Secondary)
References for CVE-2021-26318
-
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1017
Access DeniedVendor Advisory
Jump to