CVE-2020-10029

The GNU C Library (aka glibc or libc6) before 2.32 could overflow an
on-stack buffer during range reduction if an input to an 80-bit long double
function contains a non-canonical bit pattern, a seen when passing a
0x5d414141414141410000 value to sinl on x86 targets. This is related to
sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.

Bugs

• <https://sourceware.org/bugzilla/show_bug.cgi?id=25487&gt;
• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=953108&gt;