A miscompile flaw was found in LLVM. In certain conditions, the LR register can be overwritten without data being saved to the stack, which can lead to an exploitable error in the compiled code. This affects the ARM backend and can be demonstrated with Clang.
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.