An out-of-bounds write vulnerability was found in GStreamer's H.266/VVC PPS picture partition parser in gst-plugins-bad. In the multi-slice-in-tile processing of gst_h266_parser_parse_picture_partition() (gsth266parser.c), the loop iterates without checking that the slice index stays within bounds, writing past three fixed-size arrays (slice_height_in_ctus, slice_top_left_ctu_x, slice_top_left_ctu_y) in the GstH266PPS structure. While the initial proof-of-concept demonstrated a 4-byte out-of-bounds write, the code permits larger writes across multiple iterations. A crafted H.266/VVC media file can trigger this vulnerability.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21370-1 advisory.

    This update for gstreamer-plugins-bad fixes the following issues

    - CVE-2026-12891: unchecked aspect_ratio_idc value used as an array index in the H.266 parser could cause     a global out-       of-bounds read (bsc#1268872).
    - CVE-2026-12892: 1-byte heap out-of-bounds read in H.264 NAL extension slice parser (bsc#1268971).
    - CVE-2026-14935: webrtcbin accepts remote SDP without a=fingerprint due to inverted presence check     (bsc#1271051).
    - CVE-2026-52720: invalid check of total area instead of individual dimensions could trigger a heap out-     of-bounds write       (bsc#1268406).
    - CVE-2026-52721: crafted PCAP records during IPv4 or TCP header parsing could cause an out-of-bounds read       (bsc#1268408).
    - CVE-2026-52722: crafted VMnc stream with large cursor dimensions can overflow signed integer     (bsc#1268410).
    - CVE-2026-53701: multi-slice-in-tile partitions without slice index bounds checks could trigger an out-     of-bounds write       (bsc#1268172).
    - CVE-2026-53702: incorrect loop bound during H.265 SEI message parsing could result in a stack buffer     overflow       (bsc#1268168).
    - CVE-2026-59692: unvalidated peer certificate Subject DN printed during a DTLS handshake could cause a     stack buffer       overflow (bsc#1271168).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the gst package has been released.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6362 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6362-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     June 23, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : gst-plugins-bad1.0     CVE ID         : CVE-2026-52718 CVE-2026-52719 CVE-2026-53701

    Multiple security vulnerabilities were discovered in plugins for     the GStreamer media framework and its codecs and demuxers, which     may result in denial of service or potentially the execution of     arbitrary code if a malformed media file is opened.

    For the stable distribution (trixie), these problems have been fixed in     version 1.26.2-3+deb13u2.

    We recommend that you upgrade your gst-plugins-bad1.0 packages.

    For the detailed security status of gst-plugins-bad1.0 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/gst-plugins-bad1.0

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8446-1 advisory.

    It was discovered that GStreamer Bad Plugins incorrectly handled parsing H.266/VVC picture partition data.
    An attacker could use this issue to cause GStreamer Bad Plugins to crash, resulting in a denial of     service, or possibly execute arbitrary code. (CVE-2026-53701)

    It was discovered that GStreamer Bad Plugins incorrectly handled parsing H.265 buffering period metadata.
    An attacker could use this issue to cause GStreamer Bad Plugins to crash, resulting in a denial of     service, or possibly execute arbitrary code. (CVE-2026-53702)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - An out-of-bounds write vulnerability was found in GStreamer's H.266/VVC PPS picture partition parser in     gst-plugins-bad. In the multi-slice-in-tile processing of gst_h266_parser_parse_picture_partition()     (gsth266parser.c), the loop iterates without checking that the slice index stays within bounds, writing     past three fixed-size arrays (slice_height_in_ctus, slice_top_left_ctu_x, slice_top_left_ctu_y) in the     GstH266PPS structure. While the initial proof-of-concept demonstrated a 4-byte out-of-bounds write, the     code permits larger writes across multiple iterations. A crafted H.266/VVC media file can trigger this     vulnerability. (CVE-2026-53701)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
328916	openSUSE 16: gstreamer-plugins-bad / gstreamer-plugins-bad-chromaprint / etc (openSUSE-SU-2026:21370-1)	Nessus	SuSE Local Security Checks	high
324987	Photon OS 4.0: Gst PHSA-2026-4.0-1045	Nessus	PhotonOS Local Security Checks	high
322272	Debian dsa-6362 : gir1.2-gst-plugins-bad-1.0 - security update	Nessus	Debian Local Security Checks	high
321649	Ubuntu 26.04 LTS : GStreamer Bad Plugins vulnerabilities (USN-8446-1)	Nessus	Ubuntu Local Security Checks	medium
320826	Linux Distros Unpatched Vulnerability : CVE-2026-53701	Nessus	Misc.	high

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