CVE-2021-26353
Due to a mishandled error, it is possible to leave the DRTM UApp in a partially initialized state...
Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.
- Record
CVE-2021-26353- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.2 High
AV:L/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-665
- Updated
- 2026-11-02
CVE List No score
Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.
- Record
CVE-2021-26353- Updated
- 2026-11-02
EUVDEUVD-2021-13159 No score
Failure to validate inputs in SMM may allow an attacker to create a mishandled error leaving the DRTM UApp in a partially initialized state potentially resulting in loss of memory integrity.
- Record
EUVD-2021-13159- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3972-3jg9-99pp
Due to a mishandled error, it is possible to leave the DRTM UApp in a partially initialized state...
Due to a mishandled error, it is possible to leave the DRTM UApp in a partially initialized state, which can result in unchecked memory writes when the UApp handles subsequent mailbox commands.
- Record
GHSA-3972-3jg9-99pp- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-665
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-26353 is a high vulnerability (CVSS 7.8) in Amd 3rd Gen Epyc, published May 10, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.27%, the 19th percentile. No source names a fixed version.