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CVE-2021-26344

HIGH
Published 2024-08-13T16:49:52.889Z
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CVSS Score

V3.1
7.2
/10
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.000
probability
of exploitation in the wild

There is a 0.0% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.072
Higher than 7.2% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
REQUIRED
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

An out of bounds memory write when processing the AMD
PSP1 Configuration Block (APCB) could allow an attacker with access the ability
to modify the BIOS image, and the ability to sign the resulting image, to
potentially modify the APCB block resulting in arbitrary code execution.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Affected Versions:

Affected Versions:

Affected Versions:

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed HIGH

GHSA-9h7f-r33v-rw4r

Advisory Details

An out of bounds memory write when processing the AMD PSP1 Configuration Block (APCB) could allow an attacker with access the ability to modify the BIOS image, and the ability to sign the resulting image, to potentially modify the APCB block resulting in arbitrary code execution.

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

Advisory provided by GitHub Security Advisory Database. Published: August 13, 2024, Modified: August 13, 2024

References

Published: 2024-08-13T16:49:52.889Z
Last Modified: 2025-03-18T15:35:45.232Z
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