CVE-2021-32762

Redis is an open source, in-memory database that persists on disk. The
redis-cli command line tool and redis-sentinel service may be vulnerable to
integer overflow when parsing specially crafted large multi-bulk network
replies. This is a result of a vulnerability in the underlying hiredis
library which does not perform an overflow check before calling the
calloc() heap allocation function. This issue only impacts systems with
heap allocators that do not perform their own overflow checks. Most modern
systems do and are therefore not likely to be affected. Furthermore, by
default redis-sentinel uses the jemalloc allocator which is also not
vulnerable. The problem is fixed in Redis versions 6.2.6, 6.0.16 and
5.0.14.

Notes