# CVE-2026-119610: Gstreamer1-plugins-good: gstreamer1-plugins-good: out-of-bounds heap read in mtap16/mtap24 h.264 rtp depayloader via signed/unsigned underflow

Status: published. Published: 2026-11-09. Updated: 2026-11-12.

A flaw was found in GStreamer's gst-plugins-good, specifically in the H.264 RTP depayloader element. When processing MTAP16 or MTAP24 multi-time aggregation RTP packets, a signed/unsigned integer conversion error causes the remaining-length counter to underflow to a large positive value when the packet is truncated. This allows a remote, unauthenticated attacker to trigger an out-of-bounds heap read of up to approximately 64 KiB of process memory by sending a single malformed RTP packet. Successful exploitation can crash the receiving GStreamer pipeline (denial of service), and in relay or transcoding deployments where output is accessible to the attacker, may expose adjacent heap contents.

## Remediation

- workaround: Block untrusted H.264 RTP streams at the network perimeter (firewall or UDP ingress filter) to prevent malformed packets from reaching GStreamer pipelines. Alternatively, disable or avoid deploying the rtph264depay GStreamer element when processing RTP from untrusted sources. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 10 (gstreamer1-plugins-good): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gstreamer1-plugins-good): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gstreamer1-plugins-good): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gstreamer1-plugins-good): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 8.2 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H; source: CNA: redhat

- CVSS 3.1: 8.2 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.72% as of 2026-11-12; percentile 54.30%

- SSVC: exploitation none; automatable yes; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-125

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-119610 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2563952 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5310 (CNA: redhat)

- https://gstreamer.freedesktop.org/security/sa-2026-0095.html (CNA: redhat)

- https://access.redhat.com/security/cve/CVE-2026-119610 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2563952 (secalert@redhat.com)

- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5310 (secalert@redhat.com)

- https://gstreamer.freedesktop.org/security/sa-2026-0095.html (secalert@redhat.com)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-119610; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119610; retrieved 2026-11-09; source updated 2026-11-09

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-119610; retrieved 2026-11-12; source updated Not reported

Revision: 2ce10830a04ed811119ed241ee015f2327107963d583f9800ab605e4f289e474

Canonical: https://y2.dev/cve/CVE-2026-119610

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