What is CVE-2021-26386?

CVE-2021-26386 is a high-severity vulnerability in Amd Athlon™ Series, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-05-12.

How severe is CVE-2021-26386?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Amd Athlon™ Series

CVE-2021-26386

A malicious or compromised UApp or ABL may be used by an attacker to issue a malformed system call to the Stage 2 Bootloader potentially leading to corrupt memory and code execution.

Vulnerability class: Buffer Overflow

EPSS: 0.003 (17.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Amd Athlon™ Series — versions various
Amd Ryzen_3_2200u
Amd Ryzen_3_2200u_firmware
Amd Ryzen_3_2300u
Amd Ryzen_3_2300u_firmware
Amd Ryzen_3_3100
Amd Ryzen_3_3100_firmware
Amd Ryzen_3_3300g
Amd Ryzen_3_3300g_firmware
Amd Ryzen_3_3300x

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

psirt@amd.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26386?: CVE-2021-26386 is a high-severity vulnerability in Amd Athlon™ Series, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-05-12.
How severe is CVE-2021-26386?: High severity. CVSS v3 base score is 7.8 out of 10.