CVE-2025-59733 (GCVE-0-2025-59733)

Vulnerability from cvelistv5 – Published: 2025-10-06 08:09 – Updated: 2026-02-26 17:48
VLAI
Title
Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress
Summary
When decoding an OpenEXR file that uses DWAA or DWAB compression, there's an implicit assumption that all image channels have the same pixel type (and size), and that if there are four channels, the first four are "B", "G", "R" and "A". The channel parsing code can be found in decode_header. The buffer td->uncompressed_data is allocated in decode_block based on the xsize, ysize and computed current_channel_offset. The function dwa_uncompress then assumes at [5] that if there are 4 channels, these are "B", "G", "R" and "A", and in the calculations at [6] and [7] that all channels are of the same type, which matches the type of the main color channels. If we set the main color channels to a 4-byte type and add duplicate or unknown channels of the 2-byte EXR_HALF type, then the addition at [7] will increment the pointer by 4-bytes * xsize * nb_channels, which will exceed the allocated buffer. We recommend upgrading to version 8.0 or beyond.
Severity
8.7 (High)
CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-08 03:55 UTC
CWE
Assigner
Google CNA under the Google root
CNA scorecard B 77/100 over 38 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
FFmpeg FFmpeg Affected: 9a32b863074ed4140141e0d3613905c6f1fe61c5 , < 8.0 (custom)
Affected: 7.1.1 , < 8.0 (semver)
guessed Create a notification for this product.
Date Public
2025-08-04 22:00
Credits
Google Big Sleep
Show details on NVD website
To clipboard 

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              ],
              "value": "When decoding an OpenEXR file that uses DWAA or DWAB compression, there\u0027s an implicit assumption that all image channels have the same pixel type (and size), and that if there are four channels, the first four are \"B\", \"G\", \"R\"\u00a0and \"A\". The channel parsing code can be found in decode_header.\u00a0The buffer td-\u003euncompressed_data\u00a0is allocated in decode_block\u00a0based on the xsize, ysize\u00a0and computed current_channel_offset.\n\nThe function dwa_uncompress\u00a0then assumes at [5] that if there are 4 channels, these are \"B\", \"G\", \"R\"\u00a0and \"A\", and in the calculations at [6] and [7] that all channels are of the same type, which matches the type of the main color channels.\n\nIf we set the main color channels to a 4-byte type and add duplicate or unknown channels of the 2-byte EXR_HALF\u00a0type, then the addition at [7] will increment the pointer by 4-bytes * xsize * nb_channels, which will exceed the allocated buffer.\n\n\n\n\n\nWe recommend upgrading to version 8.0 or beyond."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-100",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-100 Overflow Buffers"
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "HIGH",
                "attackRequirements": "NONE",
                "attackVector": "ADJACENT",
                "baseScore": 8.7,
                "baseSeverity": "HIGH",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "HIGH",
                "subIntegrityImpact": "HIGH",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-787",
                  "description": "CWE-787 Out-of-bounds Write",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-10-19T14:52:14.577Z",
            "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
            "shortName": "Google"
          },
          "references": [
            {
              "url": "https://issuetracker.google.com/436511754"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Heap-buffer-overflow write in FFmpeg EXR dwa_uncompress",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "assignerShortName": "Google",
        "cveId": "CVE-2025-59733",
        "datePublished": "2025-10-06T08:09:37.290Z",
        "dateReserved": "2025-09-19T08:11:37.550Z",
        "dateUpdated": "2026-02-26T17:48:17.036Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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