CVE-2021-26384
HIGHCVSS 7.8/10EPSS 0.20%
Last modified
CVE-2021-26384 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
Description
A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amd | Ryzen 7 5700g Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 7 5700ge Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 5 5600g Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 5 5600ge Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 3 5300g Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 3 5300ge Firmware | < comboam4_v2_pi_1.2.0.6c |
| Amd | Ryzen 9 5980hx Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 9 5980hs Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 7 5825u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 9 5900hx Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 9 5900hs Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 7 5825c Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 7 5800h Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5625u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 7 5800hs Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5625c Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5600h Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5600hs Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 7 5800u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5600u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 5 5560u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 3 5425u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 3 5425c Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 3 5400u Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Ryzen 3 5125c Firmware | < cezannepi-fp6_1.0.0.9 |
| Amd | Athlon Silver 3050u Firmware | All versions |
| Amd | Athlon Gold 3150u Firmware | All versions |
| Amd | Ryzen 3 3200u Firmware | All versions |
| Amd | Ryzen 3 3250u Firmware | All versions |
| Amd | Ryzen 3 3300u Firmware | All versions |
| Amd | Ryzen 3 3350u Firmware | All versions |
| Amd | Ryzen 3 3450u Firmware | All versions |
| Amd | Ryzen 3 3500u Firmware | All versions |
| Amd | Ryzen 3 3500c Firmware | All versions |
| Amd | Ryzen 3 3550h Firmware | All versions |
| Amd | Ryzen 3 3580u Firmware | All versions |
| Amd | Ryzen 3 3700u Firmware | All versions |
| Amd | Ryzen 3 3700c Firmware | All versions |
| Amd | Ryzen 3 3750h Firmware | All versions |
| Amd | Ryzen 3 3780u Firmware | All versions |
| Amd | Ryzen 3 2200u Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 3 2300u Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2500u Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2600 Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2600h Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2600x Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2700 Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 5 2700x Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 7 2700 Firmware | < comboam4v2_pi_1.2.0.6c |
| Amd | Ryzen 7 2700u Firmware | < comboam4v2_pi_1.2.0.6c |
Showing 50 of 52 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26384?
A malformed SMI (System Management Interface) command may allow an attacker to establish a corrupted SMI Trigger Info data structure, potentially leading to out-of-bounds memory reads and writes when triggering an SMI resulting in a potential loss of resources.
How severe is CVE-2021-26384?
CVE-2021-26384 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26384?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-26384?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST