CVE-2026-31701ALSA: caiaq: take a reference on the USB device in create_card()
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 53 days later
· 53 days later
Published
- 6 months later
· 6 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 4dd821dcbfcecf7af6a08370b0b217cde2818acf – < 493b3a682ededc804555755f5d2193201339612d
- affected cadf1d8e9ddcd74584ec961aeac14ac549b261d8 – < dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e
- affected 237f3faf0177bdde728fa3106d730d806436aa4d – < ac7345f68cda6989016d85d63f7b244c064aa8f6
- affected 4507a8b9b30344c5ddd8219945f446d47e966a6d – < f6634af5de728a46792f674a66d7843570cb68f7
- affected a3f9314752dbb6f6aa1f0f2b4c58243bda800738 – < 1d9be95aee6c6246a21752e60c9519902649f482
- affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c – < 6473ed16df1fe88051140611b3eb9a49be7f429e
- affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c – < 59b622a043cffc58b7638cd85ae6c30a0904f8e6
- affected b04dcbb7f7b1908806b7dc22671cdbe78ff2b82c – < 80bb50e2d459213cccff3111d5ef98ed4238c0d5
- affected 3993edf44d3df7b6e8c753eac6ac8783473fcbab
- affected ebad462eec93b0f701dfe4de98990e7355283801
- affected dd0de8cb708951cebf727aa045e8242ba651bb52
- affected 5.10.231 – < 5.10.258
- affected 5.15.174 – < 5.15.209
- affected 6.1.120 – < 6.1.175
- affected 6.6.64 – < 6.6.136
- affected 6.12.2 – < 6.12.84
- affected 4.19.325 – < 4.20
- affected 5.4.287 – < 5.5
- affected 6.11.11 – < 6.12
- affected 6.13
- unaffected < 6.13
- unaffected 5.10.258 – ≤ 5.10.*
- unaffected 5.15.209 – ≤ 5.15.*
- unaffected 6.1.175 – ≤ 6.1.*
- unaffected 6.6.136 – ≤ 6.6.*
- unaffected 6.12.84 – ≤ 6.12.*
- unaffected 6.18.25 – ≤ 6.18.*
- unaffected 7.0.2 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/493b3a682ededc804555755f5d2193201339612d (opens in a new tab)
- https://git.kernel.org/stable/c/dbcf7588e8dea017ddb3f18ec2766f7d2e5f2a0e (opens in a new tab)
- https://git.kernel.org/stable/c/ac7345f68cda6989016d85d63f7b244c064aa8f6 (opens in a new tab)
- https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7 (opens in a new tab)
- https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482 (opens in a new tab)
- https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e (opens in a new tab)
- https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6 (opens in a new tab)
- https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-26510 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31701)Record last updated .