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Findings

CVE-2026-12892

A flaw was found in GStreamer's gst-plugins-bad package.

Published Jun 23, 2026 · corrected/updated Oct 16, 2026 · evidence confidence high

A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An attacker could exploit this by tricking a user into opening a malicious H.264 video file, potentially causing the application to crash or leak a single byte of heap memory.

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2026-12892 is a medium public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: gst-plugins-bad1.0 (0 → 1.22.0-4+deb12u8); gst-plugins-bad1.0 (0 → 1.26.2-3+deb13u3); gst-plugins-bad1.0 (0 → 1.28.5-1). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: CVSS 4.4, EPSS 0.2%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, epss, osv. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

  • Exploitation evidence

    Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.

  • Patch and remediation

    No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.

  • Safe detection guidance

    Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Technology hubs

Debian

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 23, 2026 · OSV.dev

    Detected

    A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An att

  2. Oct 16, 2026 · OSV.dev

    Fix available

    gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8; gst-plugins-bad1.0 fixed in 1.26.2-3+deb13u3; gst-plugins-bad1.0 fixed in 1.28.5-1

  3. Oct 16, 2026 · OSV.dev

    Fix available

    gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8

  4. Oct 16, 2026 · OSV.dev

    Fix available

    gst-plugins-bad1.0 fixed in 1.26.2-3+deb13u3

  5. Oct 16, 2026 · OSV.dev

    Fix available

    gst-plugins-bad1.0 fixed in 1.28.5-1

  6. Oct 16, 2026 · OSV.dev

    Updated

    A flaw was found in GStreamer's gst-plugins-bad package. When processing a specially crafted H.264 video file containing malformed MVC or SVC extension slice NAL units, a 1-byte heap out-of-bounds read can occur during parsing. This happens when the parser attempts to check slice boundary information without first verifying that the NAL unit contains enough data beyond the extension header. An att

Affected

  • Debian:12 gst-plugins-bad1.00 → 1.22.0-4+deb12u8
  • Debian:13 gst-plugins-bad1.00 → 1.26.2-3+deb13u3
  • Debian:14 gst-plugins-bad1.00 → 1.28.5-1

Sources

References