PT-2026-36331 · Linux · Linux Kernel

Published 2026-05-01 · Updated 2026-05-16 · CVE-2026-31701

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The caiaq driver in the ALSA subsystem stores a pointer to the parent USB device in cdev->chip.dev without taking a reference to it. This leads to a use-after-free scenario where the snd usb caiaq card free() callback, executed asynchronously via snd card free when closed(), may attempt to access cdev->chip.dev after the USB device has been disconnected and freed. Additionally, the card free implementation incorrectly calls usb reset device(cdev->chip.dev), which causes a race condition with the disconnect path during teardown.

Recommendations Update the Linux kernel to a version where the create card() function uses usb get dev() to take a reference on the USB device, the free callback uses usb put dev() to release it, and the usb reset device() call is removed.

Fix

Related Identifiers

CVE-2026-31701

ECHO-3C36-0C72-3AB5

OPENSUSE-SU-2026:10793-1

Affected Products

Linux Kernel

References · 50

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31701 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31701 · Security Note
• https://git.kernel.org/stable/c/59b622a043cffc58b7638cd85ae6c30a0904f8e6 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31701 · Vendor Advisory
• https://git.kernel.org/stable/c/6473ed16df1fe88051140611b3eb9a49be7f429e · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2026:10793-1 · Vendor Advisory
• https://git.kernel.org/stable/c/f6634af5de728a46792f674a66d7843570cb68f7 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31701 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31701 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31701 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31701 · Vendor Advisory
• https://git.kernel.org/stable/c/1d9be95aee6c6246a21752e60c9519902649f482 · Patch
• https://git.kernel.org/stable/c/80bb50e2d459213cccff3111d5ef98ed4238c0d5 · Patch
• https://suse.com/security/cve/CVE-2026-43284 · Note
• https://suse.com/security/cve/CVE-2026-31719 · Note