AMD Trusted OS (TOS) Driver Could Allow Memory Over-read via Malformed Call
CVE-2021-26380 Published on May 15, 2026

A compromised Trusted OS (TOS) driver could issue a malformed call that could potentially allow memory access outside the intended range resulting in loss of integrity.

NVD

Weakness Type

Integer Overflow or Wraparound

The software performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. An integer overflow or wraparound occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may wrap to become a very small or negative number. While this may be intended behavior in circumstances that rely on wrapping, it can have security consequences if the wrap is unexpected. This is especially the case if the integer overflow can be triggered using user-supplied inputs. This becomes security-critical when the result is used to control looping, make a security decision, or determine the offset or size in behaviors such as memory allocation, copying, concatenation, etc.

Affected Versions

AMD Ryzen™ 5000 Series Desktop Processors with Radeon™ Graphics:

Version ComboAM4v2 PI 1.2.0.5 is unaffected.

AMD Ryzen™ Threadripper™ PRO 5000 WX-Series Processors:

Version ChagallWSPI-sWRX8 1.0.0.2 is unaffected.

AMD Ryzen™ 7030 Series Mobile Processors with Radeon™ Graphics:

Version CezannePI-FP6 1.0.0.6 is unaffected.

AMD Athlon™ 3000 Series Mobile Processors with Radeon™ Graphics:

Version PicassoPI-FP5 1.0.0.E is unaffected.

AMD Ryzen™ 5000 Series Mobile Processors with Radeon™ Graphics:

Version CezannePI-FP6 1.0.0.6 is unaffected.

AMD Ryzen™ 3000 Series Desktop Processors:

Version ComboAM4PI 1.0.0.9/ ComboAM4 V2 PI 1.2.0.8 is unaffected.

AMD Athlon™ 3000 Series Desktop Processors with Radeon™ Graphics:

Version ComboAM4v2 PI 1.2.0.8 is unaffected.

AMD Ryzen™ 4000 Series Mobile Processors with Radeon™ Graphics:

Version RenoirPI-FP6 1.0.0.7 is unaffected.

AMD Ryzen™ 4000 Series Desktop Processors:

Version ComboAM4v2 PI 1.2.0.5 is unaffected.

AMD Ryzen™ 5000 Series Desktop Processors:

Version ComboAM4 V2 PI 1.2.0.8 is unaffected.

AMD Ryzen™ Embedded R1000 Series Processors:

Version EmbeddedPI-FP5_1.2.0.A is unaffected.

AMD Ryzen™ Embedded R2000 Series Processors:

Version EmbeddedR2KPI-FP5_1.0.0.2 is unaffected.

AMD Ryzen™ Embedded 5000 Series Processors:

Version EmbAM4PI 1.0.0.2 is unaffected.

AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Raven Ridge"):

Version EmbeddedPI-FP5_1.2.0.A is unaffected.

AMD Ryzen™ Embedded V1000 Series Processors (formerly codenamed "Picasso"):

Version 120A is unaffected.

AMD Ryzen™ Embedded V2000 Series Processors:

Version EmbeddedPI-FP6_1.0.0.6 is unaffected.

AMD Ryzen™ Embedded V3000 Series Processors:

Version EmbeddedPI-FP7r2_0080 is unaffected.

AMD Radeon™ RX 5000 Series Graphics Products:

Version AMD Software: Adrenalin Edition 25.10.2 (25.10.33.02 RDNA1/RDNA2) is unaffected.

AMD Radeon™ PRO W5000 Series Graphics Products:

Version AMD Software: PRO Edition 25.Q3.1 (25.10.32 RDNA) is unaffected.

AMD Radeon™ RX 6000 Series Graphics Products:

Version AMD Software: Adrenalin Edition 25.10.2 (25.10.33.02 RDNA1/RDNA2) is unaffected.

AMD Radeon™ RX Vega Series Graphics Cards:

Version AMD Software: Adrenalin Edition 25.8.1 (23.19.23.11 pre-RDNA) is unaffected.

AMD Radeon™ VII:

Version AMD Software: Adrenalin Edition 25.8.1 (23.19.23.11 pre-RDNA) is unaffected.

AMD Radeon™ PRO W6000 Series Graphics Products:

Version AMD Software: PRO Edition 25.Q3.1 (25.10.32 RDNA) is unaffected.

AMD Radeon™ PRO WX 8000/9000 Series Graphics Cards:

Version AMD Software: PRO Edition 25.Q3 (23.19.23.11 pre-RDNA) is unaffected.

AMD Radeon™ PRO VII:

Version AMD Software: PRO Edition 25.Q3 (23.19.23.11 pre-RDNA) is unaffected.

AMD Radeon™ Instinct™ MI25:

Version Contact your AMD Customer Engineering representative is unaffected.

AMD Radeon™ PRO V520:

Version Contact your AMD Customer Engineering representative is unaffected.

AMD Radeon™ PRO V620:

Version Contact your AMD Customer Engineering representative is unaffected.

AMD Trusted OS (TOS) Driver Could Allow Memory Over-read via Malformed CallCVE-2021-26380 Published on May 15, 2026

Weakness Type

Integer Overflow or Wraparound

Affected Versions

AMD Trusted OS (TOS) Driver Could Allow Memory Over-read via Malformed Call
CVE-2021-26380 Published on May 15, 2026