CVE-2026-125265 (GCVE-0-2026-125265)

Vulnerability from cvelistv5 – Published: 2026-11-09 19:12 – Updated: 2026-11-09 19:12
VLAI
Title
FFmpeg through 9.0.2 Use-After-Free via NVDEC Stale Bitstream Pointer
Summary
FFmpeg through 9.0.2 contains a use-after-free vulnerability in libavcodec/nvdec.c because ff_nvdec_start_frame() fails to reset ctx->bitstream after slice errors. Attackers can supply crafted video that abandons a picture before end_frame, causing cuvidDecodePicture() to read freed heap memory, crashing applications or exposing stale heap contents.
Severity
5.8 (Medium)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
5.3 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/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
2026-10-20 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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "9.0.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
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      "credits": [
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          "type": "finder",
          "value": "Joshua Rogers (AISLE Research)"
        },
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          "type": "remediation developer",
          "value": "Michael Niedermayer"
        }
      ],
      "datePublic": "2026-10-20T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "FFmpeg through 9.0.2 contains a use-after-free vulnerability in libavcodec/nvdec.c because ff_nvdec_start_frame() fails to reset ctx-\u003ebitstream after slice errors. Attackers can supply crafted video that abandons a picture before end_frame, causing cuvidDecodePicture() to read freed heap memory, crashing applications or exposing stale heap contents."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
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            "attackRequirements": "PRESENT",
            "attackVector": "LOCAL",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "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:H/SC:N/SI:N/SA:N",
            "version": "4.0",
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            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "NONE"
          },
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            "availabilityImpact": "HIGH",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "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:H",
            "version": "3.1"
          },
          "format": "CVSS"
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-09T19:12:06.735Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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      "references": [
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25231"
        },
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/FFmpeg/FFmpeg/commit/03cd7851955c023f1ff4c8a495d47e996d01485a"
        },
        {
          "tags": [
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          ],
          "url": "https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/nvdec.c#L694"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/FFmpeg/FFmpeg"
        },
        {
          "name": "VulnCheck Advisory: FFmpeg through 9.0.2 Use-After-Free via NVDEC Stale Bitstream Pointer",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-use-after-free-via-nvdec-stale-bitstream-pointer"
        }
      ],
      "title": "FFmpeg through 9.0.2 Use-After-Free via NVDEC Stale Bitstream Pointer",
      "x_generator": {
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      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-125265",
    "datePublished": "2026-11-09T19:12:06.735Z",
    "dateReserved": "2026-11-09T18:15:35.137Z",
    "dateUpdated": "2026-11-09T19:12:06.735Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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