CheckM8

Checkm8 is a low-level bootrom exploit that affects devices with Apple A5 to A11 chipsets, including the iPhone 4S to the iPhone X. The exploit allows for jailbreaking, which is the process of removing software restrictions imposed by Apple on iOS, tvOS and watchOS. Once jailbroken, users can install any software they want on the device, including apps and tweaks that are not available through the official Apple App Store...

The exploit was discovered and released by a security researcher known as "axi0mX" in September 2019. The exploit is considered to be a significant discovery as it is a hardware-based exploit and cannot be patched by Apple through software updates. This means that devices that are affected by the exploit will remain vulnerable even if they are running the latest version of iOS.

Checkm8 exploit can also be used for malicious purposes, such as installing malware, hacking or stealing personal information from the device.
It is important to note that jailbreaking your device can void your warranty and may also make your device more vulnerable to malware and other security threats. Additionally, jailbreaking can cause the device to become unstable and may lead to data loss or other issues.

To protect against Checkm8 exploit, it is recommended that users do not jailbreak their device and ensure that their device is running the latest version of iOS. Additionally, users can use a mobile security software to detect and remove malware, and be aware of any suspicious activity on their device.

Also, it's important to be aware that Checkm8 exploit is used in forensic and security research, and can be used by government agencies and law enforcement to access the data on locked or damaged devices.