CVE-2021-26350
MEDIUMCVSS 4.7/10EPSS 0.13%
Last modified
CVE-2021-26350 is a medium-severity vulnerability rated 4.7/10 on the CVSS scale. A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in a potential denial of service.. EPSS estimates a 0.13% chance of exploitation in the next 30 days.
Description
A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in a potential denial of service.
Metrics
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 7232p Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7302p Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7402p Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7502p Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7702p Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7252 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7262 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7272 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7282 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7302 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7352 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7402 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7452 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7502 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7532 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7542 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7552 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7642 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7662 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7702 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7742 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7f32 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7f52 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7f72 Firmware | < romepi-sp3_1.0.0.d |
| Amd | Epyc 7313p Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7443p Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7543p Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7713p Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7773x Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7763 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7713 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7663 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7643 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7573x Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 75f3 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7513 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7473x Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7453 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 74f3 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7413 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 73f3 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7373x Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 7343 Firmware | < milanpi-sp3_1.0.0.7 |
| Amd | Epyc 72f3 Firmware | < milanpi-sp3_1.0.0.7 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26350?
A TOCTOU race condition in SMU may allow for the caller to obtain and manipulate the address of a message port register which may result in a potential denial of service.
How severe is CVE-2021-26350?
CVE-2021-26350 has a CVSS score of 4.7/10 (MEDIUM severity). The EPSS model estimates a 0.13% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26350?
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.
Related CVEs from 2021
- CVE-2021-26344An out of bounds memory write when processing the AMD PSP1 C…8.2
- CVE-2021-26345Failure to validate the value in APCB may allow a privileged…4.9
- CVE-2021-26346Failure to validate the integer operand in ASP (AMD Secure P…5.5
- CVE-2021-26347Failure to validate the integer operand in ASP (AMD Secure P…4.7
- CVE-2021-26348Failure to flush the Translation Lookaside Buffer (TLB) of t…5.5
- CVE-2021-26349Failure to assign a new report ID to an imported guest may p…5.5
- CVE-2021-26351Insufficient DRAM address validation in System Management Un…5.5
- CVE-2021-26352Insufficient bound checks in System Management Unit (SMU) PC…5.5
- CVE-2021-26353Failure to validate inputs in SMM may allow an attacker to c…7.8
- CVE-2021-26354Insufficient bounds checking in ASP may allow an attacker to…5.5
- CVE-2021-26355Insufficient fencing and checks in System Management Unit (S…5.5
- CVE-2021-26356A TOCTOU in ASP bootloader may allow an attacker to tamper w…7.4
Are you affected by CVE-2021-26350?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST