CVE-2021-26363 : Security Advisory and Response
Discover details about CVE-2021-26363, a vulnerability impacting AMD Ryzen™ Series and Athlon™ Series processors, potentially leading to data exposure through malicious applications.
This article provides details about CVE-2021-26363, a security vulnerability affecting AMD Ryzen™ Series and Athlon™ Series processors. The vulnerability could potentially lead to data exposure by allowing malicious or compromised applications to change the ASP's reserved DRAM value.
Understanding CVE-2021-26363
CVE-2021-26363 is a security vulnerability identified in AMD Ryzen™ Series and Athlon™ Series processors, discovered through AMD-SB-1027 advisory.
What is CVE-2021-26363?
The vulnerability allows a malicious or compromised UApp or ABL to alter the ASP's reserved DRAM value outside of the fenced area, potentially leading to data exposure.
The Impact of CVE-2021-26363
If exploited, the vulnerability could result in unauthorized access to sensitive data processed by the affected processors, posing a risk to data confidentiality.
Technical Details of CVE-2021-26363
The following are the technical details associated with CVE-2021-26363:
Vulnerability Description
A malicious or compromised UApp or ABL could potentially change the value that the ASP uses for its reserved DRAM, to one outside of the fenced area, potentially leading to data exposure.
Affected Systems and Versions
The vulnerability affects various versions of AMD Ryzen™ Series and Athlon™ Series processors.
Exploitation Mechanism
The vulnerability can be exploited by executing a malicious or compromised UApp or ABL that alters the ASP's DRAM value.
Mitigation and Prevention
To mitigate the risks associated with CVE-2021-26363, consider the following:
Immediate Steps to Take
- Apply any patches or updates provided by AMD to address the vulnerability.
- Monitor AMD's security bulletins for any further instructions or mitigations.
Long-Term Security Practices
- Maintain updated software and firmware on affected systems.
- Implement secure coding practices to prevent exploitation of vulnerabilities.
Patching and Updates
Ensure timely installation of security patches released by AMD to address CVE-2021-26363.