CVE-2025-20805 MediaTek, Inc. CVE debrief

Who should care

Defenders of Mediatek devices with System privilege access should assess exposure and apply patches promptly to prevent potential exploitation. This includes reviewing the affected scope, applying patches, and verifying System privilege access controls. Additionally, defenders should review compensating controls for exposed systems and track exceptions and retest remediated assets.

Why it matters

CVE-2025-20805 is a memory corruption vulnerability in Mediatek devices that could lead to local escalation of privilege. Defenders of Mediatek devices with System privilege access should assess exposure and apply patches.

• Local escalation of privilege requires System privilege access
• Memory corruption could lead to privilege escalation
• No user interaction needed for exploitation
• Patching required to prevent exploitation

Technical summary

The dpe component of Mediatek devices has a memory corruption vulnerability due to use after free. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. The vulnerability affects Mediatek devices and defenders should assess exposure and apply patches to prevent potential exploitation. The technical details of the vulnerability are based on the CVE record and vendor advisory from Mediatek. The vulnerability has been confirmed and assessed by Mediatek.

Defensive priority

Assess exposure and apply patches for Mediatek devices with System privilege access.

Recommended defensive actions

• Assess exposure of Mediatek devices with System privilege access
• Apply patches for Mediatek devices with System privilege access
• Verify System privilege access controls
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability. The vendor advisory from Mediatek is also available. The vulnerability has been assessed and confirmed by Mediatek. Defenders should verify the affected scope and apply patches accordingly. The CVE Program record and NVD detail page offer additional context and guidance.

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.