CVE-2023-20523
TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially...
CVE-2023-20523 is a medium vulnerability (CVSS 5.7) in Amd 2nd Gen Epyc, published January 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 8th percentile. No source names a fixed version.
- Severity
- 5.7 MediumCVSS 3.1, NVD
- Exploit chance
- 0.18%EPSS, 8th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
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.
Attack profile
How easy it is to exploit
- Attack vector
- Physical
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
- amd 2nd gen epyc
- amd 3rd gen epyc
- amd epyc 7002 firmware
- amd epyc 7003 firmware
- amd epyc 7232p firmware
- amd epyc 7252 firmware
- amd epyc 7262 firmware
- amd epyc 7272 firmware
- amd epyc 7282 firmware
- amd epyc 72f3 firmware
- amd epyc 7302 firmware
- amd epyc 7302p firmware
Show 40 moreShow less
- amd epyc 7313 firmware
- amd epyc 7313p firmware
- amd epyc 7343 firmware
- amd epyc 7352 firmware
- amd epyc 7373x firmware
- amd epyc 73f3 firmware
- amd epyc 7402 firmware
- amd epyc 7402p firmware
- amd epyc 7413 firmware
- amd epyc 7443 firmware
- amd epyc 7443p firmware
- amd epyc 7452 firmware
- amd epyc 7453 firmware
- amd epyc 74f3 firmware
- amd epyc 7502 firmware
- amd epyc 7502p firmware
- amd epyc 7513 firmware
- amd epyc 7532 firmware
- amd epyc 7542 firmware
- amd epyc 7543 firmware
- amd epyc 7543p firmware
- amd epyc 7552 firmware
- amd epyc 7573x firmware
- amd epyc 75f3 firmware
- amd epyc 7642 firmware
- amd epyc 7643 firmware
- amd epyc 7662 firmware
- amd epyc 7663 firmware
- amd epyc 7702 firmware
- amd epyc 7702p firmware
- amd epyc 7713 firmware
- amd epyc 7713p firmware
- amd epyc 7742 firmware
- amd epyc 7743 firmware
- amd epyc 7763 firmware
- amd epyc 7773x firmware
- amd epyc 7f32 firmware
- amd epyc 7f52 firmware
- amd epyc 7f72 firmware
- amd epyc 7h12 firmware
What each source reports
NVD Score used
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.
- Record
CVE-2023-20523- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H - Weakness
- CWE-367
- Updated
- 2026-11-02
CVE List
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.
- Record
CVE-2023-20523- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H - Weakness
- CWE-367
- Updated
- 2026-11-02
EUVDEUVD-2023-24702
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.
- Record
EUVD-2023-24702- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-4p53-c8jq-g93h
TOCTOU in the ASP may allow a physical attacker to write beyond the buffer bounds, potentially...
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.
- Record
GHSA-4p53-c8jq-g93h- CVSS 3.1
- 5.7 Medium
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H - Weakness
- CWE-367
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.