CVE-2026-43422 PUBLISHED

usb: legacy: ncm: Fix NPE in gncm_bind

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

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

usb: legacy: ncm: Fix NPE in gncm_bind

Commit 56a512a9b410 ("usb: gadget: f_ncm: align net_device lifecycle with bind/unbind") deferred the allocation of the net_device. This change leads to a NULL pointer dereference in the legacy NCM driver as it attempts to access the net_device before it's fully instantiated.

Store the provided qmult, host_addr, and dev_addr into the struct ncm_opts->net_opts during gncm_bind(). These values will be properly applied to the net_device when it is allocated and configured later in the binding process by the NCM function driver.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from b62076e780a2121903ecf9ffdfb89c64647cb7da to be5738d19bed244ede84da45bc45395bcb1d99e0 (excl.)
  • affected from 188338c1827842f898761a939669cf345bdf07e2 to b23e86a3a15803c3dcb24701285f73e65099fdf9 (excl.)
  • affected from 56a512a9b4107079f68701e7d55da8507eb963d9 to fde0634ad9856b3943a2d1a8cc8de174a63ac840 (excl.)
Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 6.18.17 to 6.18.19 (excl.)
  • affected from 6.19.7 to 6.19.9 (excl.)

References