Buffer overflow in Red Hat Enterprise Linux 10
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 extend…
Vulnerability class: Buffer Overflow
EPSS: 0.005 (41.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Red Hat Enterprise Linux 10 — versions 0:1.26.7-2.el10_2.4
- Red Hat Enterprise Linux 10.0 Extended Update Support — versions 0:1.24.11-3.el10_0.4
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 7 Extended Lifecycle Support — versions 0:1.10.4-6.el7_9
- Red Hat Enterprise Linux 8 — versions 0:1.16.1-8.el8_10
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support — versions 0:1.16.1-4.el8_4.2
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-life Add-on — versions 0:1.16.1-4.el8_4.2
- Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support — versions 0:1.16.1-4.el8_6.2
- Red Hat Enterprise Linux 8.6 Extended Update Support Long-life Add-on — versions 0:1.16.1-4.el8_6.2
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
- secalert@redhat.com
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-52720?
- CVE-2026-52720 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-06-15.
- How severe is CVE-2026-52720?
- High severity. CVSS v3 base score is 8.8 out of 10.