CVE-2026-21068 Memory corruption in Samsung Mobile Devices

What is CVE-2026-21068?

CVE-2026-21068 is a high-severity memory corruption vulnerability in Samsung Android, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Stack-based buffer overflow in libril_sem.so prior to SMR Aug-2026 Release 1 allows privileged local attackers to execute arbitrary code.

Weakness: CWE-121

Which versions are affected by CVE-2026-21068?

It affects 1 product.

Products include Samsung Android.

How do I fix CVE-2026-21068?

No fix has been published for CVE-2026-21068 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-21068 being exploited?

There is no known exploitation of CVE-2026-21068 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-9qx8-f834-w4gq.