FKIE_CVE-2026-46262

Vulnerability from fkie_nvd - Published: 2026-06-03 18:16 - Updated: 2026-06-09 19:59
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0886dc6326c3cc596799c4340d342898301cf52aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29b2fbe3498da3681a01b34e4a2259f8a1b89448Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30ffcad5edb56947dccc26f6816ab7a55b21a711Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9a2a5da002775376498e8814df4a87cd629a3a0cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f16d96e1222391a6b996a1b676bec14fb91e3b2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae5a70e3e87c28edbaf9939cfef1bcbd9615420fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b0f74f5d24fe3c73ef1369a811891198b54c1e8ePatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.15.201
linux linux_kernel 6.1.164
linux linux_kernel 6.6.127
linux linux_kernel 6.12.74
linux linux_kernel 6.18.13
linux linux_kernel 6.19
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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: fsl_xcvr: Revert fix missing lock in fsl_xcvr_mode_put()\n\nThis reverts commit f51424872760 (\"ASoC: fsl_xcvr: fix missing lock in fsl_xcvr_mode_put()\").\n\nThe original patch attempted to acquire the card-\u003econtrols_rwsem lock in\nfsl_xcvr_mode_put(). However, this function is called from the upper ALSA\ncore function snd_ctl_elem_write(), which already holds the write lock on\ncontrols_rwsem for the whole put operation. So there is no need to simply\nhold the lock for fsl_xcvr_activate_ctl() again.\n\nAcquiring the read lock while holding the write lock in the same thread\nresults in a deadlock and a hung task, as reported by Alexander Stein."
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