The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-101049 advisory.

    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.

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

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

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:54658 advisory.

    GStreamer is a streaming media framework based on graphs of filters which operate on media data. The     gstreamer1-plugins-bad-free package contains a collection of plug-ins for GStreamer.

    Security Fix(es):

    * gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer     (CVE-2026-59691)

    * gstreamer: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback     (CVE-2026-59692)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:56772 advisory.

    GStreamer is a streaming media framework based on graphs of filters which operate on media data. The     gstreamer1-plugins-bad-free package contains a collection of plug-ins for GStreamer.

    Security Fix(es):

    * gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer     (CVE-2026-59691)

    * gstreamer: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback     (CVE-2026-59692)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1642:04 advisory.

    * gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer     (CVE-2026-59691)
      * gstreamer: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback     (CVE-2026-59692)

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

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

  - 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)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
341501	Unity Linux 20.1060a / 20.1070a Security Update: gstreamer1-plugins-bad-free (UTSA-2026-101049)	Nessus	Unity Linux Local Security Checks	2026/8/29	2026/8/29	high
335241	RHEL 9 : gstreamer1-plugins-bad-free (RHSA-2026:54658)	Nessus	Red Hat Local Security Checks	2026/8/13	2026/8/13	high
338010	RHEL 8 : gstreamer1-plugins-bad-free (RHSA-2026:56772)	Nessus	Red Hat Local Security Checks	2026/8/19	2026/8/19	high
339217	MiracleLinux 9 : gstreamer1-plugins-bad-free-1.22.12-7.el9_8.3 (AXSA:2026-1642:04)	Nessus	Miracle Linux Local Security Checks	2026/8/25	2026/8/25	high
332044	Amazon Linux 2 : gstreamer1-plugins-bad-free, --advisory ALAS2-2026-3833 (ALAS-2026-3833)	Nessus	Amazon Linux Local Security Checks	2026/8/4	2026/8/7	high
325937	Linux Distros Unpatched Vulnerability : CVE-2026-59691	Nessus	Misc.	2026/7/9	2026/9/2	high

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