CVE-2023-20523
CVE-2023-20523 is a medium-severity vulnerability in Amd Epyc 7h12 Firmware with a CVSS 3.x base score of 5.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-367.
Key facts
- Severity: Medium (CVSS 3.x base score 5.7)
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-367
- Affected product: Amd Epyc 7h12 Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2023-20523?
- CVE-2023-20523 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over physical access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
- Is CVE-2023-20523 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-20523?
- CVE-2023-20523 primarily affects Amd Epyc 7h12 Firmware. In total, 50 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2023-20523?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2023-20523 published?
- CVE-2023-20523 was published on 2023-01-11 and last updated on 2026-06-17.
References
Affected products (50)
- cpe:2.3:o:amd:epyc_7h12_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7f72_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7f52_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7f32_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7742_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7702p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7702_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7662_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7642_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7552_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7542_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7532_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7502p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7502_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7452_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7402_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7402p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7352_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7302p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7302_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7282_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7272_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7262_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7252_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7232p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7002_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7003_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_72f3_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7313_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7313p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7343_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7373x_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_73f3_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7413_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7443_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7443p_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7453_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_74f3_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7513_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:amd:epyc_7543_firmware:*:*:*:*:*:*:*:*
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