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Vulnerability · Published Sep 2, 2026 · Assigned by AMD

CVE-2023-20577

High 7.4

In plain English

A high-severity stack buffer overflow in 2nd Gen AMD EPYC™ Processors from AMD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).

Severity (CVSS 3.1)7.4High
Exploit odds (30 days)0.2%top 95.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A heap overflow in SMM module may allow an attacker with access to a second vulnerability that enables writing to SPI flash, potentially resulting in arbitrary code execution.

Affected products (as reported)

VendorProductVersions
AMD 2nd Gen AMD EPYC™ Processors see references
AMD 3rd Gen AMD EPYC™ Processors see references
AMD 4th Gen AMD EPYC™ Processors see references
AMD AMD Instinct™ MI300A see references
AMD AMD Ryzen™ 3000 Series Desktop Processors see references
AMD AMD Ryzen™ 5000 Series Desktop Processors see references
AMD AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7000 Series Processors see references
AMD AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 4000 Series Desktop Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ Threadripper™ 3000 Series Processors see references
AMD AMD Ryzen™ Threadripper™ PRO 3000WX Series Processors see references
AMD AMD Ryzen™ Threadripper™ PRO 5000WX Processors see references
AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics see references
AMD AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7020 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 6000 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7035 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 5000 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 3000 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7040 Series Processors with Radeon™ Graphics see references
AMD AMD Ryzen™ 7045 Series Mobile Processors see references
AMD AMD EPYC™ Embedded 3000 see references
AMD AMD EPYC™ Embedded 7002 see references
AMD AMD EPYC™ Embedded 7003 see references
AMD AMD EPYC™ Embedded 9003 see references

Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References