---
id: "CVE-2026-125712"
page: "https://infrastack.ai/live/CVE-2026-125712"
kind: "vulnerability"
aliases: ["CVE-2026-125712"]
title: "GStreamer: malformed RTCP SDES packet lets a remote sender read memory"
severity: "high"
cvss: 8.2
epss: null
exploited: false
status: "open"
category: "runtime"
products: [{"name": "gst-plugins-base", "fixed": ["1.28.4"], "affected": "< 1.28.4", "ecosystem": "vendor"}]
ecosystems: []
tags: ["gst-plugins-base", "gstreamer", "media-servers", "rtcp", "rtp", "runtime", "webrtc"]
not_affected_if: ["file-only-pipelines", "no-live-rtp-sessions"]
published_at: "2026-11-10T12:17:18+00:00"
first_seen_at: "2026-11-10T12:21:54+00:00"
updated_at: "2026-11-10T12:25:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-125712", "first_seen_at": "2026-11-10T12:21:54+00:00"}, {"source": "analyst", "url": "https://gstreamer.freedesktop.org/security/sa-2026-0030.html", "first_seen_at": "2026-11-10T12:25:17+00:00", "cites": ["https://gstreamer.freedesktop.org/security/sa-2026-0030.html", "https://www.rapid7.com/db/vulnerabilities/cve-2026-125712/"]}]
exploit_sources: []
---

# GStreamer: malformed RTCP SDES packet lets a remote sender read memory

Link for people: https://infrastack.ai/live/CVE-2026-125712 (this .md is for agents)

GStreamer's gst-plugins-base RTCP SDES parser does not check that an entry's declared length fits in the received packet. A remote sender in an active media session can make the receiver read past its packet buffer, which may crash the application or expose a limited amount of process memory.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:gst-plugins-base affected < 1.28.4 fixed 1.28.4

## How to check

Run 'gst-inspect-1.0 --version' or 'pkg-config --modversion gstreamer-plugins-base-1.0'; gst-plugins-base below 1.28.4 is affected. Check distro packages (libgstreamer-plugins-base1.0) and bundled GStreamer in apps/containers. Most exposed: apps that receive RTP/RTCP from untrusted peers (webrtcbin, rtpbin, rtspsrc, media servers). Also check gst-plugins-good: a separate RTCP SDES PRIV bug (GStreamer-SA-2026-0091) is fixed only in 1.28.8.

## Fix

Upgrade gst-plugins-base to 1.28.4 or later (upstream advisory; 1.28.9 is the latest 1.28 release). Older versions: apply the upstream patch and recompile.

## Timeline

- 2026-11-10T12:21:54+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-125712
- 2026-11-10T12:25:17+00:00 analyst https://gstreamer.freedesktop.org/security/sa-2026-0030.html — Upstream advisory GStreamer-SA-2026-0030 (affected <1.28.4, fixed 1.28.4, published 2026-06-12) matches this CVE's description (RTCP SDES OOB read in gst-plugins-base), but the advisory says 'No CVE number assigned', so the mapping is by description only; Red Hat is the CNA. NVD page unreadable; Rapid7 mirrors Red Hat text (CVSS 8.2). No exploitation or PoC found; X not searched, web-cli search worked. Verified only fix/products from the vendor page.

## Documents

- [advisory] GStreamer-SA-2026-0030: Missing bounds checks in RTCP SDES packet parsing https://gstreamer.freedesktop.org/security/sa-2026-0030.html
- [describes] Rapid7: CVE-2026-125712 (Red Hat description) https://www.rapid7.com/db/vulnerabilities/cve-2026-125712/

## From the sources

A flaw was found in GStreamer's gst-plugins-base RTCP SDES packet parser. A remote sender able to reach an active media session can supply a malformed SDES entry whose declared length exceeds the received packet. Missing bounds validation can cause the receiver to read beyond the packet buffer, potentially crashing the application or exposing a limited amount of process memory.

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