CVE-2026-52720
Last modified
CVE-2026-52720 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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. EPSS estimates a 0.64% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | All versions |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | All versions |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | All versions |
| Red Hat | Red Hat Enterprise Linux 8 | All versions |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | All versions |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | All versions |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | All versions |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | All versions |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | All versions |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | All versions |
| Red Hat | Red Hat Enterprise Linux 9 | All versions |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | All versions |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | All versions |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | All versions |
| Red Hat | Red Hat Enterprise Linux 6 | All versions |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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