Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2026-52720

Heap-based Buffer Overflow

Published: Jun 15, 2026 | Modified: Aug 03, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-52720
CWEhttps://cwe.mitre.org/data/definitions/122.html

A heap buffer overflow vulnerability was found in GStreamers 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.

Weakness

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Software

NameVendorStart VersionEnd Version
Red Hat Enterprise Linux 10RedHatgstreamer1-plugins-bad-free-0:1.26.7-2.el10_2.4*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatgstreamer1-plugins-bad-free-0:1.24.11-3.el10_0.4*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatgstreamer1-plugins-bad-free-0:1.10.4-6.el7_9*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatgstreamer-plugins-bad-free-0:0.10.23-25.el7_9*
Red Hat Enterprise Linux 8RedHatgstreamer1-plugins-bad-free-0:1.16.1-8.el8_10*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_4.2*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_4.2*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.2*
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.2*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_8.2*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatgstreamer1-plugins-bad-free-0:1.16.1-4.el8_8.2*
Red Hat Enterprise Linux 9RedHatgstreamer1-plugins-bad-free-0:1.22.12-7.el9_8.1*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatgstreamer1-plugins-bad-free-0:1.18.4-9.el9_2.3*
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRedHatgstreamer1-plugins-bad-free-0:1.22.1-6.el9_4.4*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatgstreamer1-plugins-bad-free-0:1.22.12-5.el9_6.4*
Gst-plugins-bad1.0Ubuntuquesting*

Potential Mitigations

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use