CVE-2021-43398

DISPUTED Crypto++ (aka Cryptopp) 8.6.0 and earlier contains a timing
leakage in MakePublicKey(). There is a clear correlation between execution
time and private key length, which may cause disclosure of the length
information of the private key. This might allow attackers to conduct
timing attacks. NOTE: this report is disputed by the vendor and multiple
third parties. The execution-time differences are intentional. A user may
make a choice of a longer key as a tradeoff between strength and
performance. In making this choice, the amount of information leaked to an
adversary is of infinitesimal value.