Summary: Buffer Overflow in strfmon right-justification padding:  <br/>
out-of-bounds write in the caller-supplied output buffer caused by using  <br/>
the post-padding length for the in-place `memmove`.<br/>
Requirements to exploit: A reachable application code path must invoke  <br/>
`strfmon` or `strfmon_l` with right-justified width padding and a  <br/>
destination buffer that is large enough for `__printf_buffer_pad` to  <br/>
succeed but not large enough for the subsequent overlong `memmove`. This  <br/>
may arise through attacker-influenced formatting input or through a fixed  <br/>
susceptible formatting pattern in the calling application.<br/>