CVE-2023-4039

DISPUTEDA failure in the -fstack-protector feature in GCC-based
toolchains that target AArch64 allows an attacker to exploit an existing
buffer overflow in dynamically-sized local variables in your application
without this being detected. This stack-protector failure only applies to
C99-style dynamically-sized local variables or those created using
alloca(). The stack-protector operates as intended for statically-sized
local variables. The default behavior when the stack-protector detects an
overflow is to terminate your application, resulting in controlled loss of
availability. An attacker who can exploit a buffer overflow without
triggering the stack-protector might be able to change program flow control
to cause an uncontrolled loss of availability or to go further and affect
confidentiality or integrity. NOTE: The GCC project argues that this is a
missed hardening bug and not a vulnerability by itself.

Notes