CVE-2021-44538

CVE-2021-44538: The olm_session_describe function in Matrix libolm before 3.2.7 is vulnerable to a buffer overflow. The Olm session object state is partially controllable by the remote party; crafted messages can manipulate the receiver’s session so that, for some buffer sizes, a buffer overflow ...

CVE-2021-40823

CVE-2021-40823 affects matrix-js-sdk and related Element client variants. A logic error in the room key sharing functionality prior to version 12.4.1 allows a malicious Matrix homeserver participating in an encrypted room to steal room encryption keys originally sent by affected clients, enabling...