CVE-2021-26316
What it is
Failure to validate the communication buffer and communication service in the BIOS may allow an attacker to tamper with the buffer resulting in potential SMM (System Management Mode) arbitrary code execution.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-20 · Improper input validation
- Record status
- Modified
Affected
- Amd Epyc 7h12 Firmware < romepi_1.0.0.d
- Amd Epyc 7f72 Firmware < romepi_1.0.0.d
- Amd Epyc 7f52 Firmware < romepi_1.0.0.d
- Amd Epyc 7f32 Firmware < romepi_1.0.0.d
- Amd Epyc 7742 Firmware < romepi_1.0.0.d
- Amd Epyc 7702p Firmware < romepi_1.0.0.d
- Amd Epyc 7702 Firmware < romepi_1.0.0.d
- Amd Epyc 7662 Firmware < romepi_1.0.0.d
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-26316.md and follow it. Check whether this project is affected by CVE-2021-26316. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031
- https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032