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CVE-2021-26371

UNKNOWN
Published 2023-05-09T18:59:16.122Z
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Expert Analysis

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CVSS Score

V3.1
5.5
/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.193
Higher than 19.3% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
NONE
Availability
NONE

Description

A compromised or malicious ABL or UApp could
send a SHA256 system call to the bootloader, which may result in exposure of
ASP memory to userspace, potentially leading to information disclosure.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

AMD

Ryzen™ 2000 series Desktop Processors “Raven Ridge” AM4

Affected Versions:

various
AMD

Ryzen™ 3000 Series Desktop Processors “Matisse” AM4

Affected Versions:

various
AMD

AMD Ryzen™ 5000 Series Desktop Processors “Vermeer” AM4

Affected Versions:

various
AMD

3rd Gen AMD Ryzen™ Threadripper™ Processors “Castle Peak” HEDT

Affected Versions:

various
AMD

Ryzen™ Threadripper™ PRO Processors “Castle Peak” WS

Affected Versions:

various
AMD

Ryzen™ Threadripper™ PRO Processors “Chagall” WS

Affected Versions:

various
AMD

Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Dali”/”Dali” ULP

Affected Versions:

various
AMD

Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics “Pollock”

Affected Versions:

various
AMD

Ryzen™ 2000 Series Mobile Processors “Raven Ridge” FP5

Affected Versions:

various
AMD

Ryzen™ 3000 Series Mobile processor, 2nd Gen AMD Ryzen™ Mobile Processors with Radeon™ Graphics “Picasso”

Affected Versions:

various
AMD

1st Gen AMD EPYC™ Processors

Affected Versions:

various
AMD

2nd Gen AMD EPYC™ Processors

Affected Versions:

various
AMD

3rd Gen AMD EPYC™ Processors

Affected Versions:

various

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-283q-cf8c-x432

Advisory Details

A compromised or malicious ABL or UApp could send a SHA256 system call to the bootloader, which may result in exposure of ASP memory to userspace, potentially leading to information disclosure.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-26371
WEB https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
WEB https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001

Advisory provided by GitHub Security Advisory Database. Published: May 9, 2023, Modified: April 4, 2024

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001
https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-3001
Published: 2023-05-09T18:59:16.122Z
Last Modified: 2025-01-28T15:46:02.389Z
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