High severity · published Sep 2, 2026
CVE-2023-20577
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
7.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
2G
2nd Gen AMD EPYC™ Processors · AMD
All versions, or not specified · source: vendor
3G
3rd Gen AMD EPYC™ Processors · AMD
All versions, or not specified · source: vendor
4G
4th Gen AMD EPYC™ Processors · AMD
All versions, or not specified · source: vendor
AA
AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics · AMD
All versions, or not specified · source: vendor
AA
AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics · AMD
All versions, or not specified · source: vendor
AE
AMD EPYC™ Embedded 3000 · AMD
All versions, or not specified · source: vendor
AE
AMD EPYC™ Embedded 7002 · AMD
All versions, or not specified · source: vendor
AE
AMD EPYC™ Embedded 7003 · AMD
All versions, or not specified · source: vendor
AE
AMD EPYC™ Embedded 9003 · AMD
All versions, or not specified · source: vendor
AI
AMD Instinct™ MI300A · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 3000 Series Desktop Processors · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 3000 Series Mobile Processor with Radeon™ Graphics · AMD
All versions, or not specified · source: vendor