How severe is CVE-2023-20559?

CVE-2023-20559 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-20559 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-20559?

CVE-2023-20559 primarily affects Amd Ryzen 7 5700g Firmware. In total, 89 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-20559?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-20559 published?

CVE-2023-20559 was published on 2023-04-02 and last updated on 2026-06-17.

CVE-2023-20559

CVE-2023-20559 is a high-severity vulnerability in Amd Ryzen 7 5700g Firmware with a CVSS 3.x base score of 8.8. 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-691.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-691
Affected product: Amd Ryzen 7 5700g Firmware
Published: 2023-04-02
Last modified: 2026-06-17

Description

Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.

Frequently asked questions

What is CVE-2023-20559?: Insufficient control flow management in AmdCpmGpioInitSmm may allow a privileged attacker to tamper with the SMM handler potentially leading to escalation of privileges.
How severe is CVE-2023-20559?: CVE-2023-20559 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-20559 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-20559?: CVE-2023-20559 primarily affects Amd Ryzen 7 5700g Firmware. In total, 89 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-20559?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-20559 published?: CVE-2023-20559 was published on 2023-04-02 and last updated on 2026-06-17.

References

https://www.amd.com/en/resources/product-security/bulletin/amd-sb-1027.html

Affected products (89)

cpe:2.3:o:amd:ryzen_7_5700g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5700ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300g_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5300ge_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5980hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hx_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_9_5900hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5825c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5625c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600h_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600hs_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_7_5800u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5600u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5_5560u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5425c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5400u_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_5125c_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_silver_3050u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:athlon_gold_3150u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3200u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3250u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3300u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3350u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3450u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3500c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3550h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3580u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700u_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3700c_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3750h_firmware:-:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3_3780u_firmware:-:*:*:*:*:*:*:*

More vulnerabilities in Amd Ryzen 7 5700g Firmware

CVE-2023-20596 — Critical (CVSS 9.8): Improper input validation in the SMM Supervisor may allow an attacker with a compromised SMI handler to gain Ring0…
CVE-2023-20558 — High (CVSS 8.8): Insufficient control flow management in AmdCpmOemSmm may allow a privileged attacker to tamper with the SMM handler…
CVE-2021-26365 — High (CVSS 8.2): Certain size values in firmware binary headers could trigger out of bounds reads during signature validation, leading…
CVE-2023-20571 — High (CVSS 8.1): A race condition in System Management Mode (SMM) code may allow an attacker using a compromised user space to leverage…
CVE-2023-20565 — High (CVSS 7.8): Insufficient protections in System Management Mode (SMM) code may allow an attacker to potentially enable escalation of…
CVE-2023-20563 — High (CVSS 7.8): Insufficient protections in System Management Mode (SMM) code may allow an attacker to potentially enable escalation of…

All CVEs affecting Amd Ryzen 7 5700g Firmware →

Other CWE-691 vulnerabilities

CVE-2025-25273 — High (CVSS 7.8): Insufficient control flow management in the Linux kernel-mode driver for some Intel(R) 700 Series Ethernet before…
CVE-2025-22893 — High (CVSS 7.8): Insufficient control flow management in the Linux kernel-mode driver for some Intel(R) 800 Series Ethernet before…
CVE-2021-4106 — High (CVSS 7.8): A vulnerability in Snow Inventory Java Scanner allows an attacker to run malicious code at a higher level of…
CVE-2025-35963 — High (CVSS 7.4): Insufficient control flow management for some Intel(R) PROSet/Wireless WiFi Software for Windows before version 23.160…
CVE-2025-24305 — High (CVSS 7.2): Insufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware for some Intel(R) Xeon(R)…
CVE-2025-20004 — High (CVSS 7.2): Insufficient control flow management in the Alias Checking Trusted Module for some Intel(R) Xeon(R) 6 processor E-Cores…

Browse all CWE-691 vulnerabilities →