LogoFAIL refers to a set of vulnerabilities found in the Unified Extensible Firmware Interface (UEFI) code from various independent firmware/BIOS vendors (IBVs). These vulnerabilities are present in image parsing libraries embedded into the firmware. The vulnerabilities, collectively labeled as LogoFAIL by Binarly, can be exploited by threat actors to deliver a malicious payload and bypass security technologies such as Secure Boot, Intel Boot Guard, and others. They can be weaponized to bypass security solutions and deliver persistent malware to compromised systems during the boot phase by injecting a malicious logo image file into the EFI system partition. These vulnerabilities are not silicon-specific, meaning they impact both x86 and ARM-based devices. They comprise a heap-based buffer overflow flaw and an out-of-bounds read. These vulnerabilities are triggered when the injected images are parsed, leading to the execution of payloads that could hijack the flow and bypass security mechanisms. The flaws affect all major IBVs like AMI, Insyde, and Phoenix as well as hundreds of consumer and enterprise-grade devices from vendors, including Intel, Acer, and Lenovo, making it both severe and widespread.