CVE-2021-46772
CVE-2021-46772 is a low-severity vulnerability with a CVSS 3.x base score of 3.9. 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: Low (CVSS 3.x base score 3.9)
- EPSS exploit prediction: 0% (8th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2021-33428
- Weakness: CWE-125
- Published:
- Last modified:
Description
Insufficient input validation in the ABL may allow a privileged attacker with access to the BIOS menu or UEFI shell to tamper with the structure headers in SPI ROM causing an out of bounds memory read and write, potentially resulting in memory corruption or denial of service.
Frequently asked questions
- What is CVE-2021-46772?
- Insufficient input validation in the ABL may allow a privileged attacker with access to the BIOS menu or UEFI shell to tamper with the structure headers in SPI ROM causing an out of bounds memory read and write, potentially resulting in memory corruption or denial of service.
- How severe is CVE-2021-46772?
- CVE-2021-46772 has a CVSS 3.x base score of 3.9, rated low severity. It is exploitable over local access with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
- Is CVE-2021-46772 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.
- How do I fix CVE-2021-46772?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2021-46772 have an EU (EUVD) identifier?
- Yes. CVE-2021-46772 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-33428.
- When was CVE-2021-46772 published?
- CVE-2021-46772 was published on 2024-08-13 and last updated on 2026-06-17.
References
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3003.html
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-4004.html
- https://www.amd.com/en/resources/product-security/bulletin/amd-sb-5002.html
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