CVE-2026-20570 MediaTek, Inc. CVE debrief

Who should care

Defenders responsible for Mediatek-based systems, particularly those with System privilege escalation concerns, should assess exposure and apply patches if available to prevent potential privilege escalation. This includes reviewing System privilege management and access controls to limit potential malicious actor actions. Additionally, defenders should verify patch availability and apply if possible to prevent potential privilege escalation.

Why it matters

CVE-2026-20570 is a possible escalation of privilege vulnerability in adsp due to use after free. Defenders should assess exposure and apply patches if available to prevent potential privilege escalation.

• Verify patch availability and apply if possible to prevent potential privilege escalation
• Assess exposure of Mediatek-based systems to potential local escalation of privilege
• Review System privilege management and access controls to limit potential malicious actor actions

Technical summary

The vulnerability is caused by a use after free in adsp, which could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. The vulnerability affects Mediatek-based systems, particularly those with System privilege escalation concerns. Defenders should assess exposure and apply patches if available to prevent potential privilege escalation. The patch ID is ALPS11431474 and the issue ID is MSV-9926. User interaction is not needed for exploitation. The CVE record and NVD entry provide limited information about the vulnerability.

Defensive priority

Assess exposure and apply patch if available

Recommended defensive actions

• Assess exposure to the vulnerable component
• Verify if the System privilege has been obtained by a malicious actor
• Apply patch ALPS11431474 if available
• Review System privilege management and access controls to limit potential malicious actor actions
• Verify patch availability and apply if possible to prevent potential privilege escalation
• Assess exposure of Mediatek-based systems to potential local escalation of privilege
• Review compensating controls for exposed systems while remediation is scheduled and verified

Evidence notes

The CVE record and NVD entry provide limited information about the vulnerability. The vendor, Mediatek, has provided a security bulletin with patch information. The bulletin indicates that the patch ID is ALPS11431474 and the issue ID is MSV-9926. Defenders should verify the availability of the patch and apply it if possible. The CVE record was published on 2026-11-02T03:17:34.520Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.