CVE-2026-21120 Use after free in Samsung Mobile Devices
Local attackers can execute arbitrary code with system privileges via a use-after-free vulnerability in the WSM service on Samsung mobile devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21120?
CVE-2026-21120 is a high-severity use after free vulnerability in Samsung Mobile Devices, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Use after free in WSM service prior to SMR Oct-2026 Release 1 allows local attackers to potentially execute arbitrary code with system privilege.
Weakness: CWE-416
Which versions are affected by CVE-2026-21120?
How do I fix CVE-2026-21120?
No fix has been published for CVE-2026-21120 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-21120 being exploited?
There is no known exploitation of CVE-2026-21120 in the wild and no public exploit code.
Sources
Also known as GHSA-x3xp-pxrc-cvj6.