Summary
It was discovered that LibVNCServer incorrectly handled the Tight decoder
in libvncclient. A remote attacker could use this issue to cause
LibVNCServer to crash, resulting in a denial of service, or possibly
execute arbitrary code.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 22.04 LTS 22.04:LTS | libvncserver | 0.9.13+dfsg-3ubuntu0.2 |
| Ubuntu · 24.04 LTS 24.04:LTS | libvncserver | 0.9.14+dfsg-1ubuntu0.2 |
| Ubuntu · 25.10 | libvncserver | 0.9.15+dfsg-1ubuntu0.2 |
| Ubuntu · 26.04 LTS 26.04:LTS | libvncserver | 0.9.15+dfsg-3ubuntu0.2 |
References
-
report
https://ubuntu.com/security/CVE-2026-50538