Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98769

usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_uac1_legacy: validate bRequest index in generic_{set,get}_cmd generic_set_cmd() and generic_get_cmd() use the low nibble of ctrl->bRequest as an index into con->data[]: u8 cmd = (ctrl->bRequest & 0x0F); /* 0 .. 15 */ ... con->data[cmd] = value; /* OOB when cmd >= 5 */ struct usb_audio_control (include/linux/usb/audio.h) declares data as a 5-element array, so indices 5 through 15 write (or read) up to 44 bytes past the end of the array on the heap. A malicious USB host can craft a class-specific SET_CUR / GET_CUR request with an arbitrary bRequest value, triggering the out-of-bounds access from an IRQ completion handler with no further preconditions. Add an ARRAY_SIZE() guard to both functions.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c47d7b09891abb4f8b222317c89c7469bed8db3a to < da841c1511a6160b8bc6bb7b7c6d4c9fb76fb51eaffected
  • c47d7b09891abb4f8b222317c89c7469bed8db3a to < 36f3f009049bc91e14dc856007932473318d12f8affected
  • c47d7b09891abb4f8b222317c89c7469bed8db3a to < 8c611876c002d712ae5f246af5188432c708f79daffected
  • c47d7b09891abb4f8b222317c89c7469bed8db3a to < 697cfe6e53b66cda196d6f8833b0ee97fefd0a8aaffected
  • c47d7b09891abb4f8b222317c89c7469bed8db3a to < 9062d50e75c24dc7911be05c9b1719b3b256af15affected

Linux Linux

Default version status: affected

  • 2.6.31affected
  • 0 to < 2.6.31unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.56 to ≤ 6.18.*unaffected
  • 7.2.10 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References