CVE-2021-3999

A flaw was found in glibc. An off-by-one buffer overflow and underflow in
getcwd() may lead to memory corruption when the size of the buffer is
exactly 1. A local attacker who can control the input buffer and size
passed to getcwd() in a setuid program could use this flaw to potentially
execute arbitrary code and escalate their privileges on the system.

Bugs

• <https://sourceware.org/bugzilla/show_bug.cgi?id=28769&gt;