CVE-2021-25477 Denial of service in Samsung Mobile Devices

What is CVE-2021-25477?

CVE-2021-25477 is a medium-severity denial of service vulnerability in Google Android, published on 6 Oct 2021. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

An improper error handling in Mediatek RRC Protocol stack prior to SMR Oct-2021 Release 1 allows modem crash and remote denial of service.

Weakness: CWE-415

Which versions are affected by CVE-2021-25477?

It affects 1 product.

Products include Google Android.

How do I fix CVE-2021-25477?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-25477 being exploited?

There is no known exploitation of CVE-2021-25477 in the wild and no public exploit code.

Other vulnerabilities in Google Android

• CVE-2026-58704 Google Pixel Improper Authorization Exploited High 8.8
• CVE-2025-48543 Android Runtime Use-After-Free Exploited High 8.8
• CVE-2023-35674 Android Framework Privilege Escalation Exploited High 8.8
• CVE-2025-48595 Android Framework Integer Overflow Exploited High 8.4
• CVE-2024-32896 Android Pixel Privilege Escalation Exploited High 8.1

All Google Android vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-220262213, ASB-A-220262213, GHSA-r436-49p3-g4hr, M-MOLY00684727.