Medium severity · published Sep 6, 2025
CVE-2021-26377
Insufficient parameter validation while allocating process space in the Trusted OS (TOS) may allow for a malicious userspace process to trigger an integer overflow, leading to a…
4.1
CVSS
0.2%
EPSS
No
On KEV
Description
Insufficient parameter validation while allocating process space in the Trusted OS (TOS) may allow for a malicious userspace process to trigger an integer overflow, leading to a potential denial of service.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
High
Privileges
High
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 4% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AA
AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ Instinct™ MI25 Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ PRO V520 Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ PRO V620 Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ PRO W5000 Series Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ PRO W6000 Series Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ RX 5000 Series Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Radeon™ RX 6000 Series Graphics Products · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 3000 Series Desktop Processors · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 4000 Series Desktop Processors · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics · AMD
All versions, or not specified · source: vendor
AR
AMD Ryzen™ 5000 Series Desktop Processors · AMD
All versions, or not specified · source: vendor
Affected product
AA
AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics
AMD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26377
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26377
www.amd.com
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-4012.html
www.amd.com
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-5007.html
www.amd.com
https://www.amd.com/en/resources/product-security/bulletin/AMD-SB-6018.html
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