Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-31701

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

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 4dd821dcbfcecf7af6a08370b0b217cde2818acf to < 493b3a682ededc804555755f5d2193201339612daffected
  • cadf1d8e9ddcd74584ec961aeac14ac549b261d8 to < dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0eaffected
  • 237f3faf0177bdde728fa3106d730d806436aa4d to < ac7345f68cda6989016d85d63f7b244c064aa8f6affected
  • 4507a8b9b30344c5ddd8219945f446d47e966a6d to < f6634af5de728a46792f674a66d7843570cb68f7affected
  • a3f9314752dbb6f6aa1f0f2b4c58243bda800738 to < 1d9be95aee6c6246a21752e60c9519902649f482affected
  • b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c to < 6473ed16df1fe88051140611b3eb9a49be7f429eaffected
  • b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c to < 59b622a043cffc58b7638cd85ae6c30a0904f8e6affected
  • b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c to < 80bb50e2d459213cccff3111d5ef98ed4238c0d5affected
  • 3993edf44d3df7b6e8c753eac6ac8783473fcbabaffected
  • ebad462eec93b0f701dfe4de98990e7355283801affected
  • dd0de8cb708951cebf727aa045e8242ba651bb52affected
  • 5.10.231 to < 5.10.258affected
  • 5.15.174 to < 5.15.209affected
  • 6.1.120 to < 6.1.175affected
  • 6.6.64 to < 6.6.136affected
  • 6.12.2 to < 6.12.84affected
  • 4.19.325 to < 4.20affected
  • 5.4.287 to < 5.5affected
  • 6.11.11 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.13affected
  • 0 to < 6.13unaffected
  • 5.10.258 to ≤ 5.10.*unaffected
  • 5.15.209 to ≤ 5.15.*unaffected
  • 6.1.175 to ≤ 6.1.*unaffected
  • 6.6.136 to ≤ 6.6.*unaffected
  • 6.12.84 to ≤ 6.12.*unaffected
  • 6.18.25 to ≤ 6.18.*unaffected
  • 7.0.2 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References