CVE-2023-37366 Denial of service in Exynos 850 firmware
Attackers can cause a denial of service in Samsung Exynos processors by sending malformed SM messages that trigger an infinite loop.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-37366?
CVE-2023-37366 is a low-severity denial of service vulnerability in Samsung Exynos 850 firmware, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in Samsung Exynos Mobile Processor, Automotive Processor, and Modem Exynos 9810, Exynos 9610, Exynos 9820, Exynos 980, Exynos 850, Exynos 1080, Exynos 2100, Exynos 2200, Exynos 1280, Exynos 1380, Exynos 1330, Exynos 9110, Exynos W920, Exynos Modem 5123, Exynos Modem 5300, an Exynos Auto T5123. In the Shannon SM Task, improper handling of a loop with an unreachable exit condition cannot guarantee the termination of a required service via a malformed SM message.
Weakness: CWE-835
Which versions are affected by CVE-2023-37366?
How do I fix CVE-2023-37366?
Apply the vendor's patch.
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-2023-37366 being exploited?
There is no known exploitation of CVE-2023-37366 in the wild and no public exploit code.
Sources
Also known as A-297030670, GHSA-r7v3-52v7-qv84, PUB-A-297030670.