A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into opening a malicious H.264 video file, potentially causing the application to crash or leak a single byte of heap memory.

The version of gstreamer1-plugins-bad-free installed on the remote host is prior to 1.18.4-5. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3833 advisory.

    A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video     file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur     during parsing. This happens when the parser attempts to check slice boundary information without first     verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit     this by tricking a user into opening a malicious H.264 video file, potentially causing the application to     crash or leak a single byte of heap memory. (CVE-2026-12892)

    A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a     malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the     Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This     type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and     potential memory corruption. (CVE-2026-59691)

    A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the     peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without     bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN     that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of     service. (CVE-2026-59692)

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

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

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1994 advisory.

    A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video     file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur     during parsing. This happens when the parser attempts to check slice boundary information without first     verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit     this by tricking a user into opening a malicious H.264 video file, potentially causing the application to     crash or leak a single byte of heap memory. (CVE-2026-12892)

    A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a     malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the     Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This     type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and     potential memory corruption. (CVE-2026-59691)

    A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the     peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without     bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN     that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of     service. (CVE-2026-59692)

Tenable has extracted the preceding description block directly from the tested product 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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3299-1 advisory.

    - CVE-2026-12892: 1-byte heap out-of-bounds read in H.264 NAL extension slice parser (bsc#1268971).
    - 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 payload-     size arithmetic       (bsc#1268410).
    - 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.

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.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3125-1 advisory.

    - 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-2026-53702: 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.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3133-1 advisory.

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

    - 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-2026-53702: 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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3058-1 advisory.

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

    - 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-2026-53702: 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.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 4e82a0e6-6801-42c6-8fb6-91b6b275a9e1 advisory.

    The GStreamer project reports:
    Multiple security issues were identified and fixed in the GStreamer framework.

Tenable has extracted the preceding description block directly from the FreeBSD 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.

  - A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video     file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur     during parsing. This happens when the parser attempts to check slice boundary information without first     verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit     this by tricking a user into opening a malicious H.264 video file, potentially causing the application to     crash or leak a single byte of heap memory. (CVE-2026-12892)

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

ID	Name	Product	Family	Type	Severity
332044	Amazon Linux 2 : gstreamer1-plugins-bad-free, --advisory ALAS2-2026-3833 (ALAS-2026-3833)	Nessus	Amazon Linux Local Security Checks	Local	high
332026	Amazon Linux 2023 : gstreamer1-plugin-openh264, gstreamer1-plugins-bad-free, gstreamer1-plugins-bad-free-devel (ALAS2023-2026-1994)	Nessus	Amazon Linux Local Security Checks	Local	high
330536	SUSE SLES12: gstreamer-plugins-bad / gstreamer-plugins-bad-devel / etc (SUSE-SU-2026:3299-1)	Nessus	SuSE Local Security Checks	Local	high
328916	openSUSE 16: gstreamer-plugins-bad / gstreamer-plugins-bad-chromaprint / etc (openSUSE-SU-2026:21370-1)	Nessus	SuSE Local Security Checks	Local	high
328680	SUSE SLES15: gstreamer-plugins-bad / gstreamer-plugins-bad-chromaprint / etc (SUSE-SU-2026:3125-1)	Nessus	SuSE Local Security Checks	Local	high
328677	SUSE SLES15: gstreamer-plugins-bad / gstreamer-plugins-bad-chromaprint / etc (SUSE-SU-2026:3133-1)	Nessus	SuSE Local Security Checks	Local	high
327301	SUSE SLED15: gstreamer-plugins-bad / gstreamer-plugins-bad-devel / etc (SUSE-SU-2026:3058-1)	Nessus	SuSE Local Security Checks	Local	high
323684	FreeBSD : gstreamer1 -- multiple vulnerabilities (4e82a0e6-6801-42c6-8fb6-91b6b275a9e1)	Nessus	FreeBSD Local Security Checks	Local	high
323656	Linux Distros Unpatched Vulnerability : CVE-2026-12892	Nessus	Misc.	Local	medium

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CVE-2026-12892

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