No stack-protector symbols were found, so stack-buffer overflows are not detected at runtime.
How it's exploited
Missing stack canaries (__stack_chk_guard) means a stack buffer overflow overwrites the return address without tripping a check, making classic smash-the-stack exploitation viable again.
Why it matters
Native-code overflow bugs become straightforwardly exploitable instead of crashing safely.
How to fix it
Compile with -fstack-protector-strong (Xcode/NDK default; check custom Makefiles and third-party .so/.dylib files).
Rebuild or replace vendored native libraries that lack canaries.