CVE-2026-20977 Denial of service in Samsung Mobile Devices

What is CVE-2026-20977?

CVE-2026-20977 is a medium-severity denial of service vulnerability in Samsung Android, published on 4 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper access control in Emergency Sharing prior to SMR Feb-2026 Release 1 allows local attackers to interrupt its functioning.

Which versions are affected by CVE-2026-20977?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2026-20977?

No fix has been published for CVE-2026-20977 yet. Limit exposure of the affected software until one is available.

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-2026-20977 being exploited?

There is no known exploitation of CVE-2026-20977 in the wild and no public exploit code.

Other vulnerabilities in Samsung Android

• CVE-2025-21042 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2025-21043 Samsung Mobile Devices Out-of-Bounds Write Exploited High 8.8
• CVE-2021-25487 Samsung Mobile Devices Out-of-Bounds Read Exploited High 7.3
• CVE-2021-25394 Samsung Mobile Devices Race Condition Exploited Medium 6.4
• CVE-2021-25395 Samsung Mobile Devices Race Condition Exploited Medium 6.4

All Samsung Android vulnerabilities

Sources

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

Also known as GHSA-gvp8-9xrc-2gjf.