RHSA-2026:56772 - Security Advisory

Topic

An update for gstreamer1-plugins-bad-free is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2497343 - CVE-2026-59691 gstreamer: gstreamer: rfbsrc/librfb Hextile heap out-of-bounds write with 16bpp framebuffer
• BZ - 2497344 - CVE-2026-59692 gstreamer: gstreamer: DTLS certificate Subject DN stack buffer overflow in openssl_verify_callback

CVEs

• CVE-2026-59691
• CVE-2026-59692

References

• https://access.redhat.com/security/updates/classification/#important