Vulnerability identifier: #VU60274

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41837

CWE-ID: CWE-822

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
AhciBusDxe
Hardware solutions / Drivers

Vendor:

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to untrusted pointer dereference error in SMM (System Management Mode) branch that registers a SWSMI handler. A remote attacker can use this unsafe pointer "current_ptr" to read or write or manipulate data into SMRAM.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
http://www.insyde.com/security-pledge

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Q & A

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.