CVE-2026-125269 (GCVE-0-2026-125269)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:12 – Updated: 2026-11-09 19:12
VLAI
Title
FFmpeg through 9.0.2 Double Free via cbs_sei_delete_message in cbs_sei.c
Summary
FFmpeg through 9.0.2 contains a double free vulnerability in libavcodec/cbs_sei.c where cbs_sei_delete_message() leaves a stale extension_data reference that ff_cbs_sei_add_message() reuses. Attackers can supply a crafted H.264 stream with a display orientation SEI message followed by payload extension data, processed by h264_metadata with display_orientation=insert, to corrupt heap memory.
Severity
7.3 (High)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7 (High)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
FFmpeg FFmpeg Affected: 0 , ≤ 9.0.2 (semver)
    cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-12 00:00
Credits
Claude and Ada Logics Joshua Rogers (AISLE Research) Michael Niedermayer
Show details on NVD website
To clipboard 

{
  "containers": {
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        {
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          "packageURL": "pkg:github/ffmpeg/ffmpeg",
          "product": "FFmpeg",
          "repo": "https://code.ffmpeg.org/FFmpeg/FFmpeg",
          "vendor": "FFmpeg",
          "versions": [
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              "lessThanOrEqual": "9.0.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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      "cpeApplicability": [
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      "datePublic": "2026-10-12T00:00:00.000Z",
      "descriptions": [
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        }
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            "subConfidentialityImpact": "NONE",
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            "integrityImpact": "HIGH",
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            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
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      "problemTypes": [
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        "dateUpdated": "2026-11-09T19:12:09.590Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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      "references": [
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          "tags": [
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          "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25020"
        },
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        },
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          "url": "https://github.com/FFmpeg/FFmpeg"
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          "url": "https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-double-free-via-cbs-sei-delete-message-in-cbs-sei-c"
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    "datePublished": "2026-11-09T19:12:09.590Z",
    "dateReserved": "2026-11-09T18:15:36.455Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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