# CVE-2026-92879: vgmstream resource exhaustion in MUS file parsing

Source: https://junglewise.ai/threats/cve-2026-92879-vgmstream-resource-exhaustion-in-mus-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92879 · Severity: medium · CVSS 4.3 · Published 2026-09-17

vgmstream is a widely-used audio library for playing streamed game audio formats. A malformed MUS audio file can trigger excessive resource consumption during parsing, potentially causing the application using vgmstream to become unresponsive or crash, impacting availability of systems that depend on vgmstream for audio playback.

Technologies: [Vgmstream](https://junglewise.ai/threats/technologies/vgmstream). Vendors: [Vgmstream](https://junglewise.ai/threats/vendors/vgmstream).

## Quick answers

**Is CVE-2026-92879 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92879 being exploited in the wild.

**How severe is CVE-2026-92879?** Medium severity, with a CVSS score of 4.3, published 17 September 2026.

**Which products and versions are affected?** Vgmstream up to r2117.

**Is there a fix for CVE-2026-92879?** A patch was published on 2026-08-23: Patch commit ae37662ad626254ddd96ad69ac263792d7a92024 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-92879 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-92879?** Check whether you run Vgmstream at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a resource exhaustion / denial of service flaw in the parse_mus function within src/meta/mus_acm.c of vgmstream up to revision r2117. The issue involves improper buffer and integer handling that can lead to unbounded resource consumption when processing specially-crafted MUS audio files. The attack requires network delivery of a malicious file and user interaction to open it, but no authentication is required. An attacker can cause a denial of service by exhausting CPU or memory resources. The patch (commit ae37662ad626254ddd96ad69ac263792d7a92024) addresses buffer overflow and integer overflow issues in the parsing logic.

## Affected products

- vgmstream vgmstream up to r2117

## Timeline

- 2026-09-17: disclosed
- 2026-08-23: patched: Patch commit ae37662ad626254ddd96ad69ac263792d7a92024

## References

- [https://github.com/vgmstream/vgmstream/](https://github.com/vgmstream/vgmstream/)
- [https://github.com/vgmstream/vgmstream/commit/ae37662ad626254ddd96ad69ac263792d7a92024](https://github.com/vgmstream/vgmstream/commit/ae37662ad626254ddd96ad69ac263792d7a92024)

## Related threats

- [vgmstream out-of-bounds read in VAG file handler](https://junglewise.ai/threats/cve-2026-105251-a-vulnerability-was-detected-in-vgmstream-up-to-r2117-affected)
- [vgmstream divide by zero in Microsoft IMA decoder](https://junglewise.ai/threats/cve-2026-105250-a-security-vulnerability-has-been-detected-in-vgmstream-up-to)
- [vgmstream use-after-free in TXTP file handler](https://junglewise.ai/threats/cve-2026-105249-a-weakness-has-been-identified-in-vgmstream-up-to-r2117-this)
- [vgmstream out-of-bounds write in TXTP file handler](https://junglewise.ai/threats/cve-2026-105248-a-security-flaw-has-been-discovered-in-vgmstream-up-to-r2117)
- [vgmstream divide-by-zero in AWB parser](https://junglewise.ai/threats/cve-2026-92881-vgmstream-divide-by-zero-in-awb-parser)