Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2026-29022 is a heap buffer overflow vulnerability in dr_libs version 0.14.4 and earlier, specifically in the function drwav__read_smpl_to_metadata_obj() within dr_wav.h. The flaw occurs when processing crafted WAV files containing malformed "smpl" chunks. The vulnerability arises from a mismatch between the validation of the sampleLoopCount field during the first parsing pass and its unconditional use during the second pass. In the first pass, only chunks with matching sampleLoopCount are counted and allocated memory, but in the second pass, all chunks with sufficient size are processed regardless of validation. This leads to writing 36 bytes of attacker-controlled data beyond the allocated heap buffer, causing memory corruption.'}] [1, 3]

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to heap memory corruption when processing untrusted or malicious WAV files. An attacker can exploit this flaw to cause crashes or potentially execute arbitrary code by overflowing heap allocations with crafted data. This can compromise the stability and security of applications using vulnerable versions of dr_libs for audio processing, potentially leading to denial of service or further exploitation depending on the context in which the library is used.

Useful 0 Not Useful 0

Compliance Impact

I don't know

Useful 0 Not Useful 0

Detection Guidance

This vulnerability involves processing crafted WAV files that exploit a heap buffer overflow in the dr_libs library. Detection would involve identifying untrusted or malformed WAV files being processed by vulnerable versions (0.14.4 and earlier) of dr_libs.

Since the vulnerability is triggered by WAV files containing malformed 'smpl' chunks with mismatched sampleLoopCount values, one detection approach is to analyze WAV files for such malformed chunks before processing.

There are no specific commands provided in the resources to detect this vulnerability directly on a network or system.

Useful 0 Not Useful 0

Mitigation Strategies

[{'type': 'paragraph', 'content': 'The immediate mitigation step is to update dr_libs to version 0.14.5 or later, where the vulnerability has been fixed by adding proper validation of the sampleLoopCount field in both parsing passes.'}, {'type': 'paragraph', 'content': "The fix ensures that WAV files with malformed 'smpl' chunks are rejected early, preventing heap buffer overflow and memory corruption."}, {'type': 'paragraph', 'content': 'Until the update can be applied, avoid processing untrusted or suspicious WAV files with vulnerable versions of dr_libs.'}] [2, 3]

Useful 0 Not Useful 0