CVE-2026-21089 Memory corruption in Samsung Mobile Devices
Local attackers can exploit improper input validation in the style tag removal process to write out-of-bounds memory, potentially leading to code execution or privilege escalation on Samsung mobile devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-21089?
CVE-2026-21089 is a medium-severity memory corruption vulnerability in Samsung Android, published on 9 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Improper input validation in removing style tag in libsubextractor.so prior to SMR Sep-2026 Release 1 allows local attackers to write out-of-bounds memory.
Weakness: CWE-20
Which versions are affected by CVE-2026-21089?
It affects 1 product.
Products include Samsung Android.
How do I fix CVE-2026-21089?
No fix has been published for CVE-2026-21089 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-2026-21089 being exploited?
There is no known exploitation of CVE-2026-21089 in the wild and no public exploit code.
Other vulnerabilities in Samsung Android
Sources
Also known as GHSA-fv7f-g3wg-p3v5.