Cyber ·
USN-9089-1: insecure shared memory permissions in x11vnc
Ubuntu Security notice on x11vnc, which created shared memory segments with insecure permissions. A local attacker could possibly obtain confidential information or alter screen content.
On 12 November 2026, at 20:55 UTC, the Ubuntu Security feed published notice USN-9089-1 about x11vnc, a tool that shares a computer's screen over a network. According to the notice, x11vnc created shared memory segments with insecure permissions. A local attacker could possibly exploit the problem to obtain confidential information or modify what is shown on the screen.
The text received is an automatic translation of the feed content. This summary does not state the affected versions or the fixed version. To confirm those details, consult the original notice by its identifier USN-9089-1 in the official Ubuntu Security notices list, which is the authoritative source.
To check your own case, list the installed x11vnc version in your environment and compare it with the version given in the official notice. If your version is affected, apply the package update through your distribution's package manager and confirm the newly installed version.