ALSA: caiaq: take a reference on the USB device in create_card()

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Summary

CVECVE-2026-31701
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 14:16:20 UTC
Updated2026-06-01 17:16:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: ALSA: caiaq: take a reference on the USB device in create_card() The caiaq driver stores a pointer to the parent USB device in cdev->chip.dev but never takes a reference on it. The card's private_free callback, snd_usb_caiaq_card_free(), can run asynchronously via snd_card_free_when_closed() after the USB device has already been disconnected and freed, so any access to cdev->chip.dev in that path dereferences a freed usb_device. On top of the refcounting issue, the current card_free implementation calls usb_reset_device(cdev->chip.dev). A reset in a free callback is inappropriate: the device is going away, the call takes the device lock in a teardown context, and the reset races with the disconnect path that the callback is already cleaning up after. Take a reference on the USB device in create_card() with usb_get_dev(), drop it with usb_put_dev() in the free callback, and remove the usb_reset_device() call.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000180000 probability, percentile 0.048290000 (date 2026-05-05)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4dd821dcbfcecf7af6a08370b0b217cde2818acf 493b3a682ededc804555755f5d2193201339612d git Not specified
CNA Linux Linux affected cadf1d8e9ddcd74584ec961aeac14ac549b261d8 dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e git Not specified
CNA Linux Linux affected 237f3faf0177bdde728fa3106d730d806436aa4d ac7345f68cda6989016d85d63f7b244c064aa8f6 git Not specified
CNA Linux Linux affected 4507a8b9b30344c5ddd8219945f446d47e966a6d f6634af5de728a46792f674a66d7843570cb68f7 git Not specified
CNA Linux Linux affected a3f9314752dbb6f6aa1f0f2b4c58243bda800738 1d9be95aee6c6246a21752e60c9519902649f482 git Not specified
CNA Linux Linux affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c 6473ed16df1fe88051140611b3eb9a49be7f429e git Not specified
CNA Linux Linux affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c 59b622a043cffc58b7638cd85ae6c30a0904f8e6 git Not specified
CNA Linux Linux affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c 80bb50e2d459213cccff3111d5ef98ed4238c0d5 git Not specified
CNA Linux Linux affected 3993edf44d3df7b6e8c753eac6ac8783473fcbab git Not specified
CNA Linux Linux affected ebad462eec93b0f701dfe4de98990e7355283801 git Not specified
CNA Linux Linux affected dd0de8cb708951cebf727aa045e8242ba651bb52 git Not specified
CNA Linux Linux affected 5.10.231 5.10.258 semver Not specified
CNA Linux Linux affected 5.15.174 5.15.209 semver Not specified
CNA Linux Linux affected 6.1.120 6.1.175 semver Not specified
CNA Linux Linux affected 6.6.64 6.6.136 semver Not specified
CNA Linux Linux affected 6.12.2 6.12.84 semver Not specified
CNA Linux Linux affected 4.19.325 4.20 semver Not specified
CNA Linux Linux affected 5.4.287 5.5 semver Not specified
CNA Linux Linux affected 6.11.11 6.12 semver Not specified
CNA Linux Linux affected 6.13 Not specified
CNA Linux Linux unaffected 6.13 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.84 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.25 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.2 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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