RHSA-2026:54665HighCVSS 7.5

Red Hat Security Advisory: gstreamer1-plugins-bad-free security update

Published
August 13, 2026
Last Modified
August 13, 2026

🔗 CVE IDs covered (2)

CVE-2026-59691 →CVE-2026-59692 →

📋 Description

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

🎯 Affected products16

  • Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-debuginfo-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-debuginfo-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-debuginfo-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-debuginfo-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-debugsource-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-debugsource-0:1.16.1-4.el8_6.4.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)
  • gstreamer1-plugins-bad-free-debugsource-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.6)
  • gstreamer1-plugins-bad-free-debugsource-0:1.16.1-4.el8_6.4.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: There is no complete mitigation for this vulnerability. The following measures can reduce risk: 1. Do not connect GStreamer pipelines using rfbsrc to untrusted or unknown VNC servers. 2. If the rfbsrc plugin is not required, remove the librfb plugin shared object from the GStreamer plugins directory (typically /usr/lib64/gstreamer-1.0/libgstrfbsrc.so). 3. Network-level controls (firewall rules) can restrict outbound VNC connections to trusted servers only. Workaround: There is no complete mitigation for this vulnerability. The following measures can reduce risk: 1. If WebRTC/DTLS functionality is not required, remove the DTLS plugin shared object from the GStreamer plugins directory (typically /usr/lib64/gstreamer-1.0/libgstdtls.so). 2. Restrict network access to WebRTC/DTLS endpoints to trusted peers only via firewall rules. 3. Deploy GStreamer WebRTC services behind a reverse proxy or media server that validates DTLS certificates before forwarding.

🔗 References (5)