What is CVE-2023-20523?

CVE-2023-20523 is a medium-severity vulnerability in Amd 2nd Gen Epyc, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.7/10. Published 2023-01-11.

How severe is CVE-2023-20523?

Medium severity. CVSS v3 base score is 5.7 out of 10.

Vulnerability in Amd 2nd Gen Epyc

CVE-2023-20523

TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially leading to a loss of integrity or denial of service.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

EPSS: 0.002 (7.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Amd 2nd Gen Epyc — versions various
Amd 3rd Gen Epyc — versions various
Amd Epyc_7002
Amd Epyc_7002_firmware
Amd Epyc_7003
Amd Epyc_7003_firmware
Amd Epyc_7232p
Amd Epyc_7232p_firmware
Amd Epyc_7252
Amd Epyc_7252_firmware

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

psirt@amd.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-20523?: CVE-2023-20523 is a medium-severity vulnerability in Amd 2nd Gen Epyc, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 5.7/10. Published 2023-01-11.
How severe is CVE-2023-20523?: Medium severity. CVSS v3 base score is 5.7 out of 10.