# CVE-2026-111183: GStreamer rtpL16depay heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-111183-gstreamer-rtpl16depay-heap-based-buffer-overflow-remote-code  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-21. Updated: 2026-10-21  
License: CC BY 4.0 with a link back

CVE-2026-111183 · Severity: critical · CVSS 9.8 · Published 2026-10-21

GStreamer is a multimedia processing library used by applications to handle audio and video streams. The rtpL16depay component fails to validate channel counts when processing RTP audio payloads, allowing a remote attacker to overflow a heap buffer and execute arbitrary code on systems running vulnerable applications. No user interaction is required; exploitation requires only sending a malicious RTP stream to an affected application.

Technologies: [Gstreamer](https://junglewise.ai/threats/technologies/gstreamer). Vendors: [Gstreamer](https://junglewise.ai/threats/vendors/gstreamer).

## Quick answers

**Is CVE-2026-111183 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111183 being exploited in the wild.

**How severe is CVE-2026-111183?** Critical severity, with a CVSS score of 9.8, published 21 October 2026.

**Which products and versions are affected?** GStreamer GStreamer.

**Is there a fix for CVE-2026-111183?** Yes: fixed in The fix was committed on Oct 08, 2026 (commit 80c184b4); check GStreamer releases after this date for patched versions.. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-111183 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-111183?** Check whether you run Gstreamer. 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.

## How to fix

- Fixed in The fix was committed on Oct 08, 2026 (commit 80c184b4); check GStreamer releases after this date for patched versions.

## Technical details

The vulnerability exists in the rtpL16depay, rtpL8depay, and rtpL24depay RTP depayloaders, which fail to bounds-check the channel count signaled in SDP before writing to a fixed 64-entry positions array. An attacker can craft an RTP stream with an abnormally high channel count to write beyond the array bounds. The attack is network-accessible with no authentication or user interaction required, and successful exploitation results in arbitrary code execution in the context of the library's process.

## Affected products

- GStreamer GStreamer

## Timeline

- 2026-08-20: disclosed: Vulnerability reported to vendor
- 2026-10-08: patched: Fix committed to GStreamer repository (commit 80c184b4)
- 2026-10-15: advisory: ZDI coordinated public disclosure

## References

- [https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/80c184b4c5ee8ba28b2540ba58f40b8d44b61622](https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/80c184b4c5ee8ba28b2540ba58f40b8d44b61622)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-775/](https://www.zerodayinitiative.com/advisories/ZDI-26-775/)

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- [GStreamer core buffer value deserialization use-after-free](https://junglewise.ai/threats/cve-2026-125704-a-use-after-free-flaw-was-found-in-gstreamer-core-buffer-value)
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- [GStreamer rtpsbcdepay use-after-free in RTP SBC payload parsing](https://junglewise.ai/threats/cve-2026-18299-gstreamer-rtpsbcdepay-use-after-free-in-rtp-sbc-payload-parsing)
- [GStreamer gst-plugins-good heap buffer overflow in GdkPixbuf decoder](https://junglewise.ai/threats/cve-2026-18298-gstreamer-gst-plugins-good-heap-buffer-overflow-in-gdkpixbuf)