This update for tigervnc fixes the following issues: - CVE-2019-15691: Fixed a use-after-return due to incorrect usage of stack memory in ZRLEDecoder . - CVE-2019-15692: Fixed a heap-based buffer overflow in CopyRectDecode . - CVE-2019-15693: Fixed a heap-based buffer overflow in TightDecoder::FilterGradient . - CVE-2019-15694: Fixed a heap-based buffer overflow, caused by improper error handling in processing MemOutStream . - CVE-2019-15695: Fixed a stack-based buffer overflow, which could be triggered from CMsgReader::readSetCursor .