Android Trusted OS Syscall Param Validation Vulnerability (CVE-2021-26381)
CVE-2021-26381 Published on February 10, 2026

Improper system call parameter validation in the Trusted OS may allow a malicious driver to perform mapping or unmapping operations on a large number of pages, potentially resulting in kernel memory corruption.

NVD

Weakness Type

Allocation of Resources Without Limits or Throttling

The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

Products Associated with CVE-2021-26381

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Google Android

Affected Versions

AMD Ryzen™ Threadripper™ PRO 3000 WX-Series Processors:

Version ChagallWSPI-sWRX8 1.0.0.2/ CastlePeakWSPI-sWRX8 1.0.0.9 is unaffected.

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 1.0.0.1 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 1.0.0.8 is unaffected.

AMD Ryzen™ 3000 Series Desktop Processors:

Version ComboAM4PI 1.0.0.9/ ComboAM4 V2 PI 1.2.0.8 is unaffected.

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

Version RenoirPI-FP6 1.0.0.8 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 25.4.1 (24.30.31.08), AMD Software: PRO Edition 25.Q2(25.10.10) is unaffected.

AMD Radeon™ PRO W5000 Series Graphics Products:

Version AMD Software: Adrenalin Edition 25.4.1 (24.30.31.08), AMD Software: PRO Edition 25.Q2(25.10.10) is unaffected.

AMD Radeon™ PRO W6000 Series Graphics Products:

Version AMD Software: Adrenalin Edition 25.4.1 (24.30.31.08), AMD Software: PRO Edition 25.Q2(25.10.10) is unaffected.

AMD Radeon™ RX 6000 Series Graphics Products:

Version AMD Software: Adrenalin Edition 25.4.1 (24.30.31.08), AMD Software: PRO Edition 25.Q2(25.10.10) is unaffected.

AMD Radeon™ PRO V520:

Version Contact Your AMD Customer Engineering Represenatative is unaffected.

AMD Radeon™ PRO V620:

Version Contact Your AMD Customer Engineering Represenatative is unaffected.

Exploit Probability

EPSS

0.01%

Percentile

0.73%