This security bulletin contains one high risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in SMM. A remote attacker can write fixed or predictable data to SMRAM, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.Mitigation
Install updates from vendor's website.Vulnerable software versions
AhciBusDxe: before 5.3: 05.33.34, 5.2: 05.24.34, 5.1: 05.14.34
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.