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CVE-2026-32853

HIGH

8.1

Beschreibung

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.

CVE Details

CVSS v3.1 Bewertung8.1

SchweregradHIGH

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

AngriffsvektorNETWORK

KomplexitatLOW

Erforderliche PrivilegienNONE

BenutzerinteraktionREQUIRED

Veroffentlicht3/24/2026

Zuletzt geandert3/25/2026

Quellenvd

Honeypot-Sichtungen0

Betroffene Produkte

libvncserver_project:libvncserver

Schwachen (CWE)

CWE-125

Referenzen

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)

IOC Korrelationen

Keine Korrelationen erfasst

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