CVE-2018-6829

CVE-2018-6829 is a high-severity vulnerability in Libgcrypt through version 1.8.2, specifically affecting its ElGamal encryption implementation, including products like GnuPG. The flaw stems from improper plaintext encoding, which allows attackers to glean sensitive information from ciphertext due to a lack of semantic security. With a CVSS score of 7.5, this vulnerability is remotely exploitable with low attack complexity, potentially leading to a complete compromise of confidentiality. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.