CVE-2026-31620 PUBLISHED

ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

Assigner: Linux
Reserved: 09.03.2026 Published: 24.04.2026 Updated: 24.04.2026

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usx2y: us144mkii: fix NULL deref on missing interface 0

A malicious USB device with the TASCAM US-144MKII device id can have a configuration containing bInterfaceNumber=1 but no interface 0. USB configuration descriptors are not required to assign interface numbers sequentially, so usb_ifnum_to_if(dev, 0) returns will NULL, which will then be dereferenced directly.

Fix this up by checking the return value properly.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to 09b145c1f1331c40dc955c0024d636f25417cddb (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to fbaf29ce00e7bce683f3faf4f2b326bd0a9e6602 (excl.)
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to d04dd67ab10dc978c6c843c6bd6a2a66a9444f51 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • unaffected from 6.18.24 to 6.18.* (incl.)
  • unaffected from 6.19.14 to 6.19.* (incl.)
  • unaffected from 7.0.1 to 7.0.* (incl.)

References