CVE-2021-26333

Name: CVE-2021-26333
Creator: NVD / NIST
Published: 2021-09-21T11:15:07.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.50%

Last modified Jun 17, 2026

CVE-2021-26333 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An information disclosure vulnerability exists in AMD Platform Security Processor (PSP) chipset driver. The discretionary access control list (DACL) may allow low privileged users to open a handle and send requests to the driver resulting in a potential data leak from uninitialized physical pages.. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

An information disclosure vulnerability exists in AMD Platform Security Processor (PSP) chipset driver. The discretionary access control list (DACL) may allow low privileged users to open a handle and send requests to the driver resulting in a potential data leak from uninitialized physical pages.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.50%

39.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Amd	Chipset Driver	< 3.08.17.735
Amd	Psp Driver	< 5.17.0.0

References

http://packetstormsecurity.com/files/164202/AMD-Chipset-Driver-Information-Disclosure-Memory-Leak.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Sep/24Mailing List, Third Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1009Vendor Advisory
http://packetstormsecurity.com/files/164202/AMD-Chipset-Driver-Information-Disclosure-Memory-Leak.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Sep/24Mailing List, Third Party Advisory
https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1009Vendor Advisory

Timeline

Published: Sep 21, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26333?

How severe is CVE-2021-26333?

CVE-2021-26333 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26333?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26333?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST