{"schemaVersion":3,"id":"CVE-2026-44988","aliases":["SUSE-SU-2026:22190-1","SUSE-SU-2026:2427-1","SUSE-SU-2026:2428-1","UBUNTU-CVE-2026-44988","DEBIAN-CVE-2026-44988","openSUSE-SU-2026:10905-1","openSUSE-SU-2026:21118-1"],"status":"published","duplicateOf":null,"title":null,"description":"LibVNCClient is a library for easy implementation of a VNC client. In 0.9.15 and earlier, LibVNCClient's Tight encoding decoder uses fixed-size 2048-pixel scratch buffers for the Gradient filter, but it does not reject Tight rectangles whose width is larger than 2048 pixels. A malicious VNC server can send a crafted FramebufferUpdate rectangle using Tight encoding with NoZlib | ExplicitFilter and the Gradient filter. When a LibVNCClient-based client connects, the client processes the server-controlled rectangle width and writes beyond fixed-size Gradient buffers. 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