Buffer overflow in Gstreamer
CVE-2026-111183
GStreamer rtpL16depay Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the processing of RTP payload elements. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-31143.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Gstreamer — versions 5903987091bb25e4f549331032cd2e3494cf8dae
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-26-775/ (x_research-advisory)
- gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/80c184b4c5ee8ba28b2540ba58f… (vendor-advisory)
Frequently asked questions
- What is CVE-2026-111183?
- CVE-2026-111183 is a critical-severity vulnerability in Gstreamer, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-10-21.
- How severe is CVE-2026-111183?
- Critical severity. CVSS v3 base score is 9.8 out of 10.