The BN_bn2dec function in crypto/bn/bn_print.c in OpenSSL before 1.1.0 does not properly validate division results, which allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.372
EPSS Ranking 96.9%