CVE-2026-32853

Name of the Vulnerable Software and Affected Versions LibVNCServer versions prior to commit 009008e LibVNCServer version 0.9.15

Description The software contains a heap out-of-bounds read issue in the UltraZip encoding handler. A malicious VNC server can exploit this to cause information disclosure or application crash. The issue is due to improper bounds checking in the HandleUltraZipBPP() function. Attackers can manipulate subrectangle header counts to read beyond the allocated heap buffer.

Recommendations Update to a version after commit 009008e.