CVE-2026-125195 (GCVE-0-2026-125195)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:11 – Updated: 2026-11-09 19:11
VLAI
Title
FFmpeg through 9.0.2 Uninitialized Memory Disclosure via ADPCM_MS Trellis Encoding
Summary
FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in adpcm_encode_frame() in libavcodec/adpcmenc.c that leaks heap bytes when encoding mono ADPCM_MS audio with trellis enabled. Attackers submitting audio to a service using this encoding receive output packets where about half of each block contains stale heap memory from the encoding process.
Severity
2 (Low)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
2.5 (Low)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
CWE
  • CWE-908 - Use of Uninitialized Resource
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
2026-11-02 00:00
Credits
Joshua Rogers (AISLE Research) Michael Niedermayer
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/ffmpeg/ffmpeg",
          "product": "FFmpeg",
          "repo": "https://code.ffmpeg.org/FFmpeg/FFmpeg",
          "vendor": "FFmpeg",
          "versions": [
            {
              "lessThanOrEqual": "9.0.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
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      ],
      "cpeApplicability": [
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          "type": "finder",
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      "datePublic": "2026-11-02T00:00:00.000Z",
      "descriptions": [
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          "lang": "en",
          "value": "FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in adpcm_encode_frame() in libavcodec/adpcmenc.c that leaks heap bytes when encoding mono ADPCM_MS audio with trellis enabled. Attackers submitting audio to a service using this encoding receive output packets where about half of each block contains stale heap memory from the encoding process."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
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            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 2,
            "baseSeverity": "LOW",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
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            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
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            "baseSeverity": "LOW",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N",
            "version": "3.1"
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      "problemTypes": [
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              "description": "Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T19:11:16.544Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
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          "tags": [
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          "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25694"
        },
        {
          "name": "Patch Commit",
          "tags": [
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          "url": "https://github.com/FFmpeg/FFmpeg/commit/fb13409aaffc151f602ad357db46052e98ea46e8"
        },
        {
          "tags": [
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          "url": "https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/adpcmenc.c#L785"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/FFmpeg/FFmpeg"
        },
        {
          "name": "VulnCheck Advisory: FFmpeg through 9.0.2 Uninitialized Memory Disclosure via ADPCM_MS Trellis Encoding",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-adpcm-ms-trellis-encoding"
        }
      ],
      "title": "FFmpeg through 9.0.2 Uninitialized Memory Disclosure via ADPCM_MS Trellis Encoding",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-125195",
    "datePublished": "2026-11-09T19:11:16.544Z",
    "dateReserved": "2026-11-09T18:15:10.304Z",
    "dateUpdated": "2026-11-09T19:11:16.544Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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