A cached side channel attack during handshakes using RSA encryption could allow for the decryption of encrypted content. This is a variant of the Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) and affects all NSS versions prior to NSS 3.41.
https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04
https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf
https://bugzilla.mozilla.org/show_bug.cgi?id=CVE-2018-12404
https://access.redhat.com/errata/RHSA-2019:2237
http://www.securityfocus.com/bid/107260
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html