CVE-2026-20574 MediaTek, Inc. CVE debrief

Who should care

Defenders responsible for Mediatek-based systems should assess exposure and apply patches if available. Defenders should verify if the System privilege has been obtained by a malicious actor and apply patch ALPS11431400 if available. The vulnerability affects Mediatek-based systems, and defenders should review compensating controls for exposed systems while remediation is scheduled and verified.

Why it matters

Defenders should assess exposure to the vulnerable afe component and apply patches if available to prevent local escalation of privilege.

• Local escalation of privilege requires System privilege
• Memory corruption could lead to denial of service
• Patching is required to prevent exploitation

Technical summary

The afe component is vulnerable to a use-after-free condition, which could lead to memory corruption and local escalation of privilege. The vulnerability is caused by a use-after-free condition in the afe component, which could allow a malicious actor to corrupt memory and escalate privileges. The vendor has provided a patch to address this vulnerability. Defenders should assess exposure to the vulnerable afe component and apply patches if available to prevent local escalation of privilege. The vulnerability requires System privilege to exploit.

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 ALPS11431400 if available
• 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 entry provide limited information about the vulnerability. The vendor, Mediatek, has provided a security bulletin with patch information. The bulletin indicates that the vulnerability is caused by a use-after-free condition in the afe component. Defenders should verify if the System privilege has been obtained by a malicious actor and apply patch ALPS11431400 if available. The vendor has provided a patch to address this vulnerability.

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.