How severe is CVE-2021-46794?

CVE-2021-46794 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-46794 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-46794?

CVE-2021-46794 primarily affects Amd Ryzen 5300g Firmware. In total, 168 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-46794?

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-2021-46794 published?

CVE-2021-46794 was published on 2023-05-09 and last updated on 2026-06-17.

CVE-2021-46794

CVE-2021-46794 is a high-severity vulnerability in Amd Ryzen 5300g Firmware with a CVSS 3.x base score of 7.5. 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-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Amd Ryzen 5300g Firmware
Published: 2023-05-09
Last modified: 2026-06-17

Description

Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.

Frequently asked questions

What is CVE-2021-46794?: Insufficient bounds checking in ASP (AMD Secure Processor) may allow for an out of bounds read in SMI (System Management Interface) mailbox checksum calculation triggering a data abort, resulting in a potential denial of service.
How severe is CVE-2021-46794?: CVE-2021-46794 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-46794 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-46794?: CVE-2021-46794 primarily affects Amd Ryzen 5300g Firmware. In total, 168 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-46794?: 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-2021-46794 published?: CVE-2021-46794 was published on 2023-05-09 and last updated on 2026-06-17.

References

https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-4001

Affected products (168)

cpe:2.3:o:amd:ryzen_5300g_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5300ge_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5500_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600g_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600ge_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5600x_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700g_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700ge_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5700x_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x3d_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5800x_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5900x_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5945wx_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5950x_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5955wx_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5965wx_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5975wx_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_5995wx_firmware:cezannepi-fp6_1.0.0.6:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3100_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3100_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3100_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3100_firmware:renoirpi-fp6_1.0.0.7:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3300x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3300x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3300x_firmware:renoirpi-fp6_1.0.0.7:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500_firmware:renoirpi-fp6_1.0.0.7:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4pi_1.0.0.9:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4v2_pi_1.2.0.5:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500x_firmware:comboam4v2_pi_1.2.0.8:*:*:*:*:*:*:*
cpe:2.3:o:amd:ryzen_3500x_firmware:picassopi-fp5_1.0.0.e:*:*:*:*:*:*:*

More vulnerabilities in Amd Ryzen 5300g Firmware

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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