CVE-2026-52720 — CVE & Security Advisory Radar

🎯 CVE-2026-52720 🇪🇺 EUVD

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CVE-2026-52720 | A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

Klassifikation & Betroffenheit:

Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions patch: 0:1.22.1-6.el9_4.4Red Hat Enterprise Linux 8 patch: 0:1.16.1-8.el8_10Red Hat Enterprise Linux 10.0 Extended Update Support patch: 0:1.24.11-3.el10_0.4Red Hat Enterprise Linux 10 patch: 0:1.26.7-2.el10_2.4Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On patch: 0:1.16.1-4.el8_6.2Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On patch: 0:1.16.1-4.el8_4.2Red Hat Enterprise Linux 9.6 Extended Update Support patch: 0:1.22.12-5.el9_6.4Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support patch: 0:1.16.1-4.el8_4.2

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2026-67567 9.9 CVE-2026-70496 9.9 CVE-2026-66795 9.9 CVE-2026-66792 9.9 CVE-2026-72508 9.9

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 06/2026

Heute 19.09.

CVSS-Vektor-Analyse: 8.8

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Erforderlich

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Hoch

A · Verfügbarkeit Hoch

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

Veröffentlicht:15.06.2026

Aktualisiert:03.08.2026 13:18

Assigner (CNA):redhat

EUVD-ID:EUVD-2026-36803

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-31	2026-09-19
≥90 %	0	0
≥50 %	0	0
≥10 %	0	0
<10 %	300	299

EPSS

64%

CVE-2026-52720 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

Red Hat

CVE-2026-52720 | A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

15.06.2026

🛡️ Details ➔

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