Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : LibVNCServer vulnerabilities (USN-8463-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8463-1 advisory. It was discovered that LibVNCServer had a memory leak in the client cleanup function. An attacker could possibly use this...

USN-8463-1 libvncserver vulnerabilities

It was discovered that LibVNCServer had a memory leak in the client cleanup function. An attacker could possibly use this issue to cause LibVNCServer to consume memory, leading to a denial of service. This issue only affected Ubuntu 22.04 LTS. CVE-2020-29260 It was discovered that LibVNCServer di...

OESA-2026-2253 libvncserver security update

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...

CVE-2026-32854

LibVNCServer versions 0.9.15 and prior fixed in commit dc78dee contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput in httpd.c that allow remote attackers to cause a denial of service by sending specially crafted HTTP requests. Attackers can exploit...

UBUNTU-CVE-2026-32854

LibVNCServer versions 0.9.15 and prior fixed in commit dc78dee contain null pointer dereference vulnerabilities in the HTTP proxy handlers within httpProcessInput in httpd.c that allow remote attackers to cause a denial of service by sending specially crafted HTTP requests. Attackers can exploit...