Use After Free in Gstreamer
CVE-2026-18299
GStreamer rtpsbcdepay Use-After-Free 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 validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29787.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (9.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Gstreamer — versions 99fde1184fe8b12d0721230941c1bf2080913183
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-26-467/ (x_research-advisory, Third Party Advisory)
- gstreamer.freedesktop.org/security/sa-2026-0051.html (vendor-advisory, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18299?
- CVE-2026-18299 is a high-severity vulnerability in Gstreamer, classified under Use After Free. CVSS score: 7.8/10. Published 2026-08-20.
- How severe is CVE-2026-18299?
- High severity. CVSS v3 base score is 7.8 out of 10.