Affected: AlmaLinux:9: gstreamer1-plugins-bad-free, AlmaLinux:9: gstreamer1-plugins-bad-free-devel, AlmaLinux:9: gstreamer1-plugins-bad-free-libs

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.

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.

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.

gstreamer1-plugins-bad-free: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer gstreamer1-plugins-bad-free: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback

gstreamer1-plugins-bad-free: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer gstreamer1-plugins-bad-free: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback

Affected: Rocky Linux:9: gstreamer1-plugins-bad-free

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.

Affected: Ubuntu:Pro:14.04:LTS: gst-plugins-bad1.0, Ubuntu:Pro:16.04:LTS: gst-plugins-bad1.0, Ubuntu:Pro:18.04:LTS: gst-plugins-bad1.0, Ubuntu:Pro:20.04:LTS: gst-plugins-bad1.0, Ubuntu:Pro:22.04:LTS: gst-plugins-bad1.0, Ubuntu:Pro:24.04:LTS: gst-plugins-bad1.0, Ubuntu:25.10: gst-plugins-bad1.0, Ubuntu:26.04:LTS: gst-plugins-bad1.0

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.

Ein Angreifer kann mehrere Schwachstellen in GStreamer ausnutzen, um möglicherweise beliebigen Code auszuführen, Daten zu manipulieren oder einen Denial-of-Service-Zustand auszulösen.