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CVE-2026-32853

HIGH

8.1

Descripcion

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 HandleUltraZipBPP() function by manipulating subrectangle header counts to read beyond the allocated heap buffer.

Detalles CVE

Puntuacion CVSS v3.18.1

SeveridadHIGH

Vector CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Vector de ataqueNETWORK

ComplejidadLOW

Privilegios requeridosNONE

Interaccion usuarioREQUIRED

Publicado3/24/2026

Ultima modificacion3/25/2026

Fuentenvd

Avistamientos honeypot0

Productos afectados

libvncserver_project:libvncserver

Debilidades (CWE)

CWE-125

Referencias

https://github.com/LibVNC/libvncserver/commit/009008e2f4d5a54dd71f422070df3af7b3dbc931(disclosure@vulncheck.com)

https://github.com/LibVNC/libvncserver/security/advisories/GHSA-87q7-v983-qwcj(disclosure@vulncheck.com)

https://www.vulncheck.com/advisories/libvncserver-ultrazip-encoding-heap-out-of-bounds-read(disclosure@vulncheck.com)

https://github.com/LibVNC/libvncserver/security/advisories/GHSA-87q7-v983-qwcj(134c704f-9b21-4f2e-91b3-4a467353bcc0)

Correlaciones IOC

Sin correlaciones registradas

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