7.8
HIGH CVSS 3.1
CVE-2026-71261
dr_wav.h W64 CUE Chunk Metadata Parsing Integer Overflow Leading to Heap Buffer Overflow on 32-bit Builds
Description

dr_libs dr_wav.h (all versions through current master) contains an integer overflow in W64 CUE chunk metadata parsing. In drwav__metadata_process_chunk, a stage-1 capacity estimate truncates the 64-bit W64 chunk sizeInBytes to size_t before dividing by DRWAV_CUE_POINT_BYTES; on 32-bit builds this truncation causes the pre-allocated extra metadata capacity to be computed incorrectly.

INFO

Published Date :

Aug. 5, 2026, 1:24 p.m.

Last Modified :

Oct. 24, 2026, 3:10 p.m.

Remotely Exploit :

No

Source :

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Affected Products

The following products are affected by CVE-2026-71261 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Mackron dr_libs
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
Solution
Fix an integer overflow in W64 CUE chunk parsing to prevent heap buffer overflows.
  • Update dr_libs dr_wav.h to patch integer overflow.
  • Ensure 64-bit size checks are performed.
  • Validate metadata capacity before reading.
  • Avoid assertions for release builds.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-71261.

URL Resource
https://github.com/mackron/dr_libs
https://github.com/mackron/dr_libs/blob/master/dr_wav.h
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-71261 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-71261 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-71261 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2026-71261 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Translated by [email protected]

    Oct. 24, 2026

    Action Type Old Value New Value
    Changed Translation Title: dr_libs de mackron, Description: dr_libs dr_wav.h (todas las versiones hasta la actual master) contiene un desbordamiento de entero en el análisis de metadatos de fragmentos CUE W64. En drwav__metadata_process_chunk(), una estimación de capacidad de etapa 1 trunca el tamaño de fragmento W64 de 64 bits sizeInBytes a size_t antes de dividir por DRWAV_CUE_POINT_BYTES; en compilaciones de 32 bits esta truncación causa que la capacidad de metadatos extra preasignada se calcule incorrectamente. La lectura subsiguiente en drwav__read_cue_to_metadata_obj() calcula el recuento real de puntos de referencia y el tamaño de asignación utilizando el campo cuePointCount de precisión completa y controlado por el atacante sin cotejarlo con la estimación de capacidad de etapa 1, y la única aplicación de límites en la región de memoria resultante (drwav__metadata_get_memory()) es un DRWAV_ASSERT, que se compila como una operación nula bajo -DNDEBUG (el valor predeterminado para las compilaciones de lanzamiento). Un archivo WAV W64 manipulado puede, por lo tanto, causar un desbordamiento de búfer de pila en cualquier aplicación de 32 bits que analice metadatos WAV no confiables. Title: dr_libs de mackron, Description: dr_libs dr_wav.h (todas las versiones hasta la actual master) contiene un desbordamiento de entero en el análisis de metadatos de fragmentos CUE W64. En drwav__metadata_process_chunk(), una estimación de capacidad de etapa 1 trunca el tamaño de fragmento W64 de 64 bits sizeInBytes a size_t antes de dividir por DRWAV_CUE_POINT_BYTES; en compilaciones de 32 bits esta truncación causa que la capacidad de metadatos extra preasignada se calcule incorrectamente. La lectura subsiguiente en drwav__read_cue_to_metadata_obj() calcula el recuento real de puntos de referencia y el tamaño de asignación utilizando el campo cuePointCount de precisión completa y controlado por el atacante sin cotejarlo con la estimación de capacidad de etapa 1, y la única aplicación de límites en la región de memoria resultante (drwav__metadata_get_memory()) es un DRWAV_ASSERT, que se compila como una operación nula bajo -DNDEBUG (el valor predeterminado para las compilaciones de lanzamiento). Un archivo WAV W64 manipulado puede, por lo tanto, causar un desbordamiento de búfer de pila en cualquier aplicación de 32 bits que analice metadatos WAV no confiables.
  • CVE Translated by [email protected]

    Oct. 23, 2026

    Action Type Old Value New Value
    Added Translation Title: dr_libs de mackron, Description: dr_libs dr_wav.h (todas las versiones hasta la actual master) contiene un desbordamiento de entero en el análisis de metadatos de fragmentos CUE W64. En drwav__metadata_process_chunk(), una estimación de capacidad de etapa 1 trunca el tamaño de fragmento W64 de 64 bits sizeInBytes a size_t antes de dividir por DRWAV_CUE_POINT_BYTES; en compilaciones de 32 bits esta truncación causa que la capacidad de metadatos extra preasignada se calcule incorrectamente. La lectura subsiguiente en drwav__read_cue_to_metadata_obj() calcula el recuento real de puntos de referencia y el tamaño de asignación utilizando el campo cuePointCount de precisión completa y controlado por el atacante sin cotejarlo con la estimación de capacidad de etapa 1, y la única aplicación de límites en la región de memoria resultante (drwav__metadata_get_memory()) es un DRWAV_ASSERT, que se compila como una operación nula bajo -DNDEBUG (el valor predeterminado para las compilaciones de lanzamiento). Un archivo WAV W64 manipulado puede, por lo tanto, causar un desbordamiento de búfer de pila en cualquier aplicación de 32 bits que analice metadatos WAV no confiables.
  • CVE Modified by 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

    Aug. 10, 2026

    Action Type Old Value New Value
    Changed Description dr_libs dr_wav.h (all versions through current master) contains an integer overflow in W64 CUE chunk metadata parsing. In drwav__metadata_process_chunk(), a stage-1 capacity estimate truncates the 64-bit W64 chunk sizeInBytes to size_t before dividing by DRWAV_CUE_POINT_BYTES; on 32-bit builds this truncation causes the pre-allocated extra metadata capacity to be computed incorrectly. The subsequent read in drwav__read_cue_to_metadata_obj() computes the actual cue point count and allocation size using the full-precision, attacker-controlled cuePointCount field without cross-checking it against the stage-1 capacity estimate, and the only bounds enforcement on the resulting memory region (drwav__metadata_get_memory()) is a DRWAV_ASSERT, which compiles to a no-op under -DNDEBUG (the default for release builds). A crafted W64 WAV file can therefore cause a heap buffer overflow in any 32-bit application parsing untrusted WAV metadata. dr_libs dr_wav.h (all versions through current master) contains an integer overflow in W64 CUE chunk metadata parsing. In drwav__metadata_process_chunk, a stage-1 capacity estimate truncates the 64-bit W64 chunk sizeInBytes to size_t before dividing by DRWAV_CUE_POINT_BYTES; on 32-bit builds this truncation causes the pre-allocated extra metadata capacity to be computed incorrectly.
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 05, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-71261', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-05T15:36:58.042254Z'}
  • New CVE Received by 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c

    Aug. 05, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'mackron', 'product': 'dr_libs', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'programFiles': ['dr_wav.h'], 'defaultStatus': 'unaffected'}]
    Added Description dr_libs dr_wav.h (all versions through current master) contains an integer overflow in W64 CUE chunk metadata parsing. In drwav__metadata_process_chunk(), a stage-1 capacity estimate truncates the 64-bit W64 chunk sizeInBytes to size_t before dividing by DRWAV_CUE_POINT_BYTES; on 32-bit builds this truncation causes the pre-allocated extra metadata capacity to be computed incorrectly. The subsequent read in drwav__read_cue_to_metadata_obj() computes the actual cue point count and allocation size using the full-precision, attacker-controlled cuePointCount field without cross-checking it against the stage-1 capacity estimate, and the only bounds enforcement on the resulting memory region (drwav__metadata_get_memory()) is a DRWAV_ASSERT, which compiles to a no-op under -DNDEBUG (the default for release builds). A crafted W64 WAV file can therefore cause a heap buffer overflow in any 32-bit application parsing untrusted WAV metadata.
    Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Added CWE CWE-190
    Added Reference https://github.com/mackron/dr_libs
    Added Reference https://github.com/mackron/dr_libs/blob/master/dr_wav.h
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.