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

Source: https://junglewise.ai/threats/cve-2026-59692-gstreamer-dtls-plugin-stack-buffer-overflow-in-openssl-verify  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-09. Updated: 2026-07-09  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/gst-plugins-bad). Vendors: [Gstreamer](https://junglewise.ai/threats/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

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-59692](https://access.redhat.com/security/cve/CVE-2026-59692)
- [https://bugzilla.redhat.com/show_bug.cgi?id=2497344](https://bugzilla.redhat.com/show_bug.cgi?id=2497344)
- [https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/99](https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/99)
- [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172)

## Related threats

- [GStreamer gst-plugins-bad out-of-bounds read in MPEG/DVD parsing](https://junglewise.ai/threats/cve-2026-125706-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-mpeg-program)
- [GStreamer gst-plugins-bad MXF plugin buffer overflow in VANC handling](https://junglewise.ai/threats/cve-2026-125703-a-flaw-was-found-in-the-gstreamer-gst-plugins-bad-mxf-plugin)
- [GStreamer gst-plugins-bad H.265 uninitialized memory use](https://junglewise.ai/threats/cve-2026-121611-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-package-a-use-of)
- [GStreamer MXF demuxer out-of-bounds read](https://junglewise.ai/threats/cve-2026-121601-a-flaw-was-found-in-gstreamer-s-mxf-demuxer-plugin-gst-plugins)
- [GStreamer gst-plugins-bad JPEG 2000 decimator integer overflow and division by zero](https://junglewise.ai/threats/cve-2026-121259-a-flaw-was-found-in-the-gstreamer-jpeg-2000-decimator-in-gst)