CVE-2026-21111 Memory corruption in libsthmbc
Local attackers can exploit an out-of-bounds write in a Samsung mobile library to achieve code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21111?
CVE-2026-21111 is a medium-severity memory corruption vulnerability in Samsung Mobile libsthmbc, published on 9 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Out-of-bounds write in libsthmbc.so prior to One UI 8.5 allows local attackers to write out-of-bounds memory.
Weakness: CWE-787
Which versions are affected by CVE-2026-21111?
How do I fix CVE-2026-21111?
No fix has been published for CVE-2026-21111 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-2026-21111 being exploited?
There is no known exploitation of CVE-2026-21111 in the wild and no public exploit code.
Sources
Also known as GHSA-x69q-4h23-g7jv.