A stack corruption bug was found in libtpms while decrypting data using RSA. The bug exists in CryptRsaDecrypt() in src/tpm2/crypto/openssl/CryptRsa.c. This flaw could cause a SIGBUS (bad memory access) and termination of swtpm. Upstream commits: https://github.com/stefanberger/libtpms/commit/505ef841c00b4c096b1977c667cb957bec3a1d8b [v0.8.0] https://github.com/stefanberger/libtpms/commit/40cfe134c017d3aeaaed05ce71eaf9bfbe556b16 [v0.7.2]
This bug has been fixed a while ago. I think this bugzilla can be closed.