Medium · published March 27, 2019
CVSS calls it medium at 5.3. It sits in the 99.1th percentile for exploit probability.
A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected.