# CVE-2026-52720: gst-plugins-bad1.0: A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client) CVE-2026-52720 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2026-52720, released June 15, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-52720 - Priority: High - CVSS: 8.8 (high) - EPSS: 0.0064 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 15, 2026 ## 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. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gst-plugins-bad1.0 Debian 12.15 (bookworm) | 1.22.0-4+deb12u8 | [DEBIAN-CVE-2026-52720](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52720.md) | Jun 15, 2026 | | Linux | gst-plugins-bad1.0 Debian 13.5 (trixie) | 1.26.2-3+deb13u3 | [DEBIAN-CVE-2026-52720](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52720.md) | Jun 15, 2026 | | Linux | gst-plugins-bad1.0 Debian 14 | 1.28.5-1 | [DEBIAN-CVE-2026-52720](https://patchblox.com/security/data/fix/linux/debian-cve-2026-52720.md) | Jun 15, 2026 | | Linux | gstreamer-plugins-bad opensuse-leap 16.0 | 1.26.7-160000.3.1 | [OPENSUSE-SU-2026:21370-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21370-1.md) | Jul 18, 2026 | | Linux | gstreamer-plugins-bad sles 15.6 | 1.24.0-150600.4.9.1 | [SUSE-SU-2026:3058-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3058-1.md) | Jul 15, 2026 | | Linux | gstreamer-plugins-bad sles 15.7 | 1.24.0-150600.4.9.1 | [SUSE-SU-2026:3058-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3058-1.md) | Jul 15, 2026 | | Linux | gstreamer-plugins-bad sles 16.0 | 1.26.7-160000.3.1 | [SUSE-SU-2026:22817-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22817-1.md) | Jul 18, 2026 | | Linux | gstreamer1-plugin-openh264 amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugin-openh264-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free RHEL 10 | 1.24.11-3.el10_0.4 | [RHSA-2026:47717](https://patchblox.com/security/data/fix/linux/rhsa-2026-47717.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free RHEL 8 | 0:1.16.1-8.el8_10 | [RHSA-2026:37130](https://patchblox.com/security/data/fix/linux/rhsa-2026-37130.md) | Jul 10, 2026 | | Linux | gstreamer1-plugins-bad-free RHEL 9 | 0:1.22.12-7.el9_8.1 | [RHSA-2026:36834](https://patchblox.com/security/data/fix/linux/rhsa-2026-36834.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free almalinux 10 | 1.26.7-2.el10_2.4 | [ALSA-2026:36749](https://patchblox.com/security/data/fix/linux/alsa-2026-36749.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free almalinux 8 | 1.16.1-8.el8_10 | [ALSA-2026:37130](https://patchblox.com/security/data/fix/linux/alsa-2026-37130.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free almalinux 9 | 1.22.12-7.el9_8.1 | [ALSA-2026:36834](https://patchblox.com/security/data/fix/linux/alsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free ol 10 | 0:1.26.7-2.el10_2.4 | [ELSA-2026-36749](https://patchblox.com/security/data/fix/linux/elsa-2026-36749.md) | Jul 16, 2026 | | Linux | gstreamer1-plugins-bad-free ol 8 | 0:1.16.1-8.0.1.el8_10 | [ELSA-2026-37130](https://patchblox.com/security/data/fix/linux/elsa-2026-37130.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free ol 9 | 0:1.22.12-7.el9_8.1 | [ELSA-2026-36834](https://patchblox.com/security/data/fix/linux/elsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free rocky 10 | 0:1.26.7-2.el10_2.4 | [RLSA-2026:36749](https://patchblox.com/security/data/fix/linux/rlsa-2026-36749.md) | Jul 10, 2026 | | Linux | gstreamer1-plugins-bad-free rocky 8 | 0:1.16.1-8.el8_10 | [RLSA-2026:37130](https://patchblox.com/security/data/fix/linux/rlsa-2026-37130.md) | Jul 10, 2026 | | Linux | gstreamer1-plugins-bad-free rocky 9 | 0:1.22.12-7.el9_8.1 | [RLSA-2026:36834](https://patchblox.com/security/data/fix/linux/rlsa-2026-36834.md) | Jul 10, 2026 | | Linux | gstreamer1-plugins-bad-free-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free-debugsource amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free-devel RHEL 8 | 0:1.16.1-8.el8_10 | [RHSA-2026:37130](https://patchblox.com/security/data/fix/linux/rhsa-2026-37130.md) | Jul 10, 2026 | | Linux | gstreamer1-plugins-bad-free-devel RHEL 9 | 0:1.22.12-7.el9_8.1 | [RHSA-2026:36834](https://patchblox.com/security/data/fix/linux/rhsa-2026-36834.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free-devel almalinux 10 | 1.26.7-2.el10_2.4 | [ALSA-2026:36749](https://patchblox.com/security/data/fix/linux/alsa-2026-36749.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-devel almalinux 8 | 1.16.1-8.el8_10 | [ALSA-2026:37130](https://patchblox.com/security/data/fix/linux/alsa-2026-37130.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free-devel almalinux 9 | 1.22.12-7.el9_8.1 | [ALSA-2026:36834](https://patchblox.com/security/data/fix/linux/alsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-devel amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free-devel ol 10 | 0:1.26.7-2.el10_2.4 | [ELSA-2026-36749](https://patchblox.com/security/data/fix/linux/elsa-2026-36749.md) | Jul 16, 2026 | | Linux | gstreamer1-plugins-bad-free-devel ol 8 | 0:1.16.1-8.0.1.el8_10 | [ELSA-2026-37130](https://patchblox.com/security/data/fix/linux/elsa-2026-37130.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free-devel ol 9 | 0:1.22.12-7.el9_8.1 | [ELSA-2026-36834](https://patchblox.com/security/data/fix/linux/elsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-libs RHEL 9 | 0:1.22.12-7.el9_8.1 | [RHSA-2026:36834](https://patchblox.com/security/data/fix/linux/rhsa-2026-36834.md) | Jul 9, 2026 | | Linux | gstreamer1-plugins-bad-free-libs almalinux 10 | 1.26.7-2.el10_2.4 | [ALSA-2026:36749](https://patchblox.com/security/data/fix/linux/alsa-2026-36749.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-libs almalinux 9 | 1.22.12-7.el9_8.1 | [ALSA-2026:36834](https://patchblox.com/security/data/fix/linux/alsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-libs amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | | Linux | gstreamer1-plugins-bad-free-libs ol 10 | 0:1.26.7-2.el10_2.4 | [ELSA-2026-36749](https://patchblox.com/security/data/fix/linux/elsa-2026-36749.md) | Jul 16, 2026 | | Linux | gstreamer1-plugins-bad-free-libs ol 9 | 0:1.22.12-7.el9_8.1 | [ELSA-2026-36834](https://patchblox.com/security/data/fix/linux/elsa-2026-36834.md) | Jul 8, 2026 | | Linux | gstreamer1-plugins-bad-free-libs-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.6 | [ALAS2023-2026-1917](https://patchblox.com/security/data/fix/linux/alas2023-2026-1917.md) | Jul 6, 2026 | --- Data as of 2026-11-09T19:38:12Z UTC. 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