{"schema_version":"1.7.2","id":"OESA-2026-3318","modified":"2026-08-13T13:57:19Z","published":"2026-08-13T13:57:19Z","upstream":["CVE-2026-50538"],"summary":"libvncserver security update","details":"libvncserver is a set of programs using the RFB (Remote Frame Buffer) protocol. They are designed to "export" a frame buffer via net: you set up a server and can connect to it via VNC viewers. If the server supports WebSockets (which LibVNCServer does), you can also connect using an in-browser VNC viewer like noVNC. It is already in wide use for administration, but it is not that easy to program a server yourself.\r\n\r\nSecurity Fix(es):\n\nAn attacker-controlled heap out-of-bounds write vulnerability exists in the Tight decoder of libvncclient within libvncserver. An attacker can trigger a heap out-of-bounds write via crafted packets, potentially leading to denial of service or remote code execution.(CVE-2026-50538)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP1","name":"libvncserver","purl":"pkg:rpm/openEuler/libvncserver&distro=openEuler-24.03-LTS-SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.13-6.oe2403sp1"}]}],"ecosystem_specific":{"aarch64":["libvncserver-0.9.13-6.oe2403sp1.aarch64.rpm","libvncserver-debuginfo-0.9.13-6.oe2403sp1.aarch64.rpm","libvncserver-debugsource-0.9.13-6.oe2403sp1.aarch64.rpm","libvncserver-devel-0.9.13-6.oe2403sp1.aarch64.rpm"],"src":["libvncserver-0.9.13-6.oe2403sp1.src.rpm"],"x86_64":["libvncserver-0.9.13-6.oe2403sp1.x86_64.rpm","libvncserver-debuginfo-0.9.13-6.oe2403sp1.x86_64.rpm","libvncserver-debugsource-0.9.13-6.oe2403sp1.x86_64.rpm","libvncserver-devel-0.9.13-6.oe2403sp1.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3318"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-50538"}],"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"database_specific":{"severity":"High"}}