# CVE-2026-53702: gst-plugins-bad1.0: A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad) CVE-2026-53702 is fixed in 19 products on 1 platform, first by gir1.2-gst-plugins-bad-1.0 1.28.2-1ubuntu1.1, released June 11, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-53702 - Priority: Routine - CVSS: 6.5 (medium) - EPSS: 0.0023 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 11, 2026 ## Description A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad). When parsing a buffering period SEI message, the parser uses an incorrect loop bound derived from cpb_cnt_minus1[i] (the loop index) instead of the sub-layer 0 CPB count cpb_cnt_minus1[0] from the referenced Sequence Parameter Set. A crafted H.265 video file or stream can cause the parser to write beyond the bounds of stack-allocated CPB delay arrays, resulting in a crash or potential stack memory corruption. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gir1.2-gst-plugins-bad-1.0 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gir1.2-gst-plugins-bad-1.0 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-gst-plugins-bad-1.0-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | gir1.2-gst-plugins-extra-1.0 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gir1.2-gst-plugins-extra-1.0 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-gst-plugins-extra-1.0-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | gst-plugins-bad1.0 Debian 12.15 (bookworm) | 1.22.0-4+deb12u8 | [DEBIAN-CVE-2026-53702](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53702.md) | Jun 24, 2026 | | Linux | gst-plugins-bad1.0 Debian 14 | 1.28.3-1 | [DEBIAN-CVE-2026-53702](https://patchblox.com/security/data/fix/linux/debian-cve-2026-53702.md) | Jun 24, 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 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-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 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 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-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 | gstreamer1.0-opencv Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gstreamer1.0-opencv 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-opencv-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | gstreamer1.0-plugins-bad Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gstreamer1.0-plugins-bad 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-plugins-bad-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | gstreamer1.0-plugins-bad-apps Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gstreamer1.0-plugins-bad-apps 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-plugins-bad-apps-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | gstreamer1.0-plugins-extra Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [gstreamer1.0-plugins-extra 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gstreamer1.0-plugins-extra-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | libgstreamer-opencv1.0-0 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [libgstreamer-opencv1.0-0 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgstreamer-opencv1.0-0-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | libgstreamer-plugins-bad1.0-0 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [libgstreamer-plugins-bad1.0-0 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgstreamer-plugins-bad1.0-0-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | | Linux | libgstreamer-plugins-extra1.0-0 Ubuntu 26.04.1 LTS (resolute) | 1.28.2-1ubuntu1.1 | [libgstreamer-plugins-extra1.0-0 1.28.2-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libgstreamer-plugins-extra1.0-0-1.28.2-1ubuntu1.1.md) | Jun 11, 2026 | --- Data as of 2026-11-08T06:59:42Z UTC. 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