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CVE-2023-20556

19
FAUCET Score

CVE-2023-20556 describes an insufficient input validation vulnerability in AMD μProf, affecting AMD, Linux, and Microsoft Windows systems. An authenticated local attacker can send a malformed IOCTL buffer, leading to a Windows crash and denial of service. With a CVSS score of 5.5 (Medium), this vulnerability has low attack complexity and requires local user privileges, impacting system availability. There is currently no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.1.396CPE matchmatch criteria
cpe:2.3:a:amd:amd_uprof:*:*:*:*:*:*:*:*
< 4.1-424CPE matchmatch criteria
cpe:2.3:a:amd:amd_uprof:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.25%
Probability of exploitation in next 30 days
EPSS Percentile
16.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0025 is in the 68th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2023-20556Moderate

hw: amd: uProf allow user to send arbitrary buffer leading to dos

Aug 8, 2023

References

amd.com / en/corporate/product-security/bulletin/AMD-SB-7003
MitigationPatchVendor Advisory