CVE-2026-31701None▾ SunlitIn 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 referen…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= 4dd821dcbfcecf7af6a08370b0b217cde2818acf < 493b3a682ededc804555755f5d2193201339612dLinux >= cadf1d8e9ddcd74584ec961aeac14ac549b261d8 < dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0eLinux >= 237f3faf0177bdde728fa3106d730d806436aa4d < ac7345f68cda6989016d85d63f7b244c064aa8f6Linux >= 4507a8b9b30344c5ddd8219945f446d47e966a6d < f6634af5de728a46792f674a66d7843570cb68f7Linux >= a3f9314752dbb6f6aa1f0f2b4c58243bda800738 < 1d9be95aee6c6246a21752e60c9519902649f482Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 6473ed16df1fe88051140611b3eb9a49be7f429eLinux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 59b622a043cffc58b7638cd85ae6c30a0904f8e6Linux >= b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c < 80bb50e2d459213cccff3111d5ef98ed4238c0d5Linux 3993edf44d3df7b6e8c753eac6ac8783473fcbabLinux ebad462eec93b0f701dfe4de98990e7355283801Linux dd0de8cb708951cebf727aa045e8242ba651bb52Linux >= 5.10.231 < 5.10.258Linux >= 5.15.174 < 5.15.209Linux >= 6.1.120 < 6.1.175Linux >= 6.6.64 < 6.6.136Linux >= 6.12.2 < 6.12.84Linux >= 4.19.325 < 4.20Linux >= 5.4.287 < 5.5Linux >= 6.11.11 < 6.12Linux 6.13Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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