CVE-2026-59692: GStreamer DTLS plugin stack buffer overflow in openssl_verify_callback

CVE-2026-59692 · Severity: high · CVSS 7.5 · Published 2026-07-09

GStreamer is a widely used multimedia framework for processing audio and video streams. A security flaw in its DTLS plugin allows a remote attacker to crash applications using the library by sending a specially crafted security certificate during a connection attempt. This results in a denial of service, potentially disrupting video calls or streaming services, though it does not appear to allow for data theft or full system takeover.

Technologies: Gstreamer Gst-Plugins-Bad. Vendors: Gstreamer.

Quick answers

Is CVE-2026-59692 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-59692 being exploited in the wild.
How severe is CVE-2026-59692?
High severity, with a CVSS score of 7.5, published 9 July 2026.
Which products and versions are affected?
Gstreamer Gst-Plugins-Bad Enterprise Linux 6, 7, 8, 9, 10.
Is there a fix for CVE-2026-59692?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-59692 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-59692?
Check whether you run Gstreamer Gst-Plugins-Bad at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A stack-based buffer overflow (CWE-121) exists in the openssl_verify_callback() function within GStreamer's DTLS plugin (gst-plugins-bad). The vulnerability occurs when the peer certificate's Subject Distinguished Name (DN) is printed into a fixed-size 2048-byte stack buffer using X509_NAME_print_ex() and BIO_read() without proper bounds checking. An unauthenticated remote attacker can trigger this by presenting a certificate with an oversized Subject DN during a DTLS-SRTP or WebRTC handshake. While the overflow can cause a process crash (DoS), exploitability for remote code execution is limited by stack canaries and the fact that the overflow content is escaped to printable ASCII. A fix is planned for GStreamer version 1.28.5.

Affected products

  • Red Hat gst-plugins-bad-free Enterprise Linux 6, 7, 8, 9, 10
  • GStreamer gst-plugins-bad 1.28.3

Timeline

  • 2026-07-06: disclosed: Reported to Red Hat Bugzilla
  • 2026-07-09: advisory: NVD publication date

References

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