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HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.","Type":"Description","Title":null},{"CveYear":"2017","CveId":"17806","Ordinal":"2","NoteData":"2017-12-20","Type":"Other","Title":"Published"},{"CveYear":"2017","CveId":"17806","Ordinal":"3","NoteData":"2018-10-31","Type":"Other","Title":"Modified"}]}}}