CVE-2026-53702
A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad).
Published Jun 11, 2026 · corrected/updated Oct 16, 2026 · evidence confidence medium
A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad). When parsing a buffering period SEI message, the parser uses an incorrect loop bound derived from cpb_cnt_minus1[i] (the loop index) instead of the sub-layer 0 CPB count cpb_cnt_minus1[0] from the referenced Sequence Parameter Set. A crafted H.265 video file or stream can cause the parser to write beyond the bounds of stack-allocated CPB delay arrays, resulting in a crash or potential stack memory corruption.
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-2026-53702 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 (1.26.10-1, 1.26.10-2, 1.26.2-3); gst-plugins-bad1.0 (0 → 1.28.3-1). 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 6.5. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, 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
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.
Jun 11, 2026 · OSV.dev
Detected
A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad). When parsing a buffering period SEI message, the parser uses an incorrect loop bound derived from cpb_cnt_minus1[i] (the loop index) instead of the sub-layer 0 CPB count cpb_cnt_minus1[0] from the referenced Sequence Parameter Set. A crafted H.265 video file or stream can cause the parser to write
Oct 16, 2026 · OSV.dev
Fix available
gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8; gst-plugins-bad1.0 fixed in 1.28.3-1
Oct 16, 2026 · OSV.dev
Fix available
gst-plugins-bad1.0 fixed in 1.22.0-4+deb12u8
Oct 16, 2026 · OSV.dev
Fix available
gst-plugins-bad1.0 fixed in 1.28.3-1
Oct 16, 2026 · OSV.dev
Updated
A stack buffer overflow flaw was found in the GStreamer H.265 codec parser library (gst-plugins-bad). When parsing a buffering period SEI message, the parser uses an incorrect loop bound derived from cpb_cnt_minus1[i] (the loop index) instead of the sub-layer 0 CPB count cpb_cnt_minus1[0] from the referenced Sequence Parameter Set. A crafted H.265 video file or stream can cause the parser to write
Affected
- Debian:12 gst-plugins-bad1.00 → 1.22.0-4+deb12u8
- Debian:13 gst-plugins-bad1.01.26.10-1, 1.26.10-2, 1.26.2-3
- Debian:14 gst-plugins-bad1.00 → 1.28.3-1