CVE-2026-32853

A flaw was found in LibVNCServer. A malicious VNC server can exploit an improper bounds checking vulnerability in the UltraZip encoding handler, specifically within the HandleUltraZipBPP function. By manipulating subrectangle header counts, an attacker can read beyond the allocated memory buffer...

CVE-2026-32853 LibVNCServer UltraZip Encoding Heap Out-of-bounds Read

LibVNCServer versions 0.9.15 and prior fixed in commit 009008e contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Attackers can exploit improper bounds checking in the...

CVE-2026-32853

LibVNCServer versions 0.9.15 and prior fixed in commit 009008e contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Attackers can exploit improper bounds checking in the...

SUSE CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

DEBIAN-CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

CVE-2017-5581

Buffer overflow in the ModifiablePixelBuffer::fillRect function in TigerVNC before 1.7.1 allows remote servers to execute arbitrary code via an RRE message with subrectangle outside framebuffer boundaries...

CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

Updated gtk-vnc packages fix security vulnerability

It was found that gtk-vnc code does not properly check boundaries of subrectangle-containing tiles. A malicious server can use this to overwrite parts of the client memory CVE-2017-5884. In addition, the vncconnectionservermessage and vnccolormapset functions do not check for integer overflow...

UBUNTU-CVE-2017-5884

gtk-vnc before 0.7.0 does not properly check boundaries of subrectangle-containing tiles, which allows remote servers to execute arbitrary code via the src x, y coordinates in a crafted 1 rre, 2 hextile, or 3 copyrect tile...

CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...

ALPINE-CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...

CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...

DEBIAN-CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...

CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...

CVE-2016-9941

Heap-based buffer overflow in rfbproto.c in LibVNCClient in LibVNCServer before 0.9.11 allows remote servers to cause a denial of service application crash or possibly execute arbitrary code via a crafted FramebufferUpdate message containing a subrectangle outside of the client drawing area...