CVE-2026-43436 PUBLISHED

ALSA: usb-audio: Check endpoint numbers at parsing Scarlett2 mixer interfaces

Assigner: Linux
Reserved: 01.05.2026 Published: 08.05.2026 Updated: 09.05.2026

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

ALSA: usb-audio: Check endpoint numbers at parsing Scarlett2 mixer interfaces

The Scarlett2 mixer quirk in USB-audio driver may hit a NULL dereference when a malformed USB descriptor is passed, since it assumes the presence of an endpoint in the parsed interface in scarlett2_find_fc_interface(), as reported by fuzzer.

For avoiding the NULL dereference, just add the sanity check of bNumEndpoints and skip the invalid interface.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to b014cc945baba75816cda0cf8934be87c9ed4947 (excl.)
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to c5c5a6c53cf3b658f1d4512dfa61f3cd25bc34ba (excl.)
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to b267255c15d2a5b90c4e926146aa155e5161e264 (excl.)
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to 3d542cf3c4c854cdf5d58049771f68926b9eb2b9 (excl.)
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to 3d4f23885e4b90347c9a1d779af6e79a99b5172a (excl.)
  • affected from 6c0a2078134aba6a77291554035304df9e16b85c to df1d8abf36ca3681c21a6809eaa9a1e01ef897a6 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 5.14 is affected
  • unaffected from 0 to 5.14 (excl.)
  • unaffected from 6.1.167 to 6.1.* (incl.)
  • unaffected from 6.6.130 to 6.6.* (incl.)
  • unaffected from 6.12.78 to 6.12.* (incl.)
  • unaffected from 6.18.19 to 6.18.* (incl.)
  • unaffected from 6.19.9 to 6.19.* (incl.)
  • unaffected from 7.0 to * (incl.)

References