CVE-2026-46262
ASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory 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
References (7)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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