CVE-2025-21776

MEDIUM EPSS 12.9%
Published Feb 27, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: USB: hub: Ignore non-compliant devices with too many configs or interfaces Robert Morris created a test program which can cause usb_hub_to_struct_hub() to dereference a NULL or inappropriate pointer: Oops: general protection fault, probably for non-canonical address 0xcccccccccccccccc: 0000 [#1] SMP DEBUG_PAGEALLOC PTI CPU: 7 UID: 0 PID: 117 Comm: kworker/7:1 Not tainted 6.13.0-rc3-00017-gf44d154d6e3d #14 Hardware name: FreeBSD BHYVE/BHYVE, BIOS 14.0 10/17/2021 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_hub_adjust_deviceremovable+0x78/0x110 ... Call Trace: <TASK> ? die_addr+0x31/0x80 ? exc_general_protection+0x1b4/0x3c0 ? asm_exc_general_protection+0x26/0x30 ? usb_hub_adjust_deviceremovable+0x78/0x110 hub_probe+0x7c7/0xab0 usb_probe_interface+0x14b/0x350 really_probe+0xd0/0x2d0 ? __pfx___device_attach_driver+0x10/0x10 __driver_probe_device+0x6e/0x110 driver_probe_device+0x1a/0x90 __device_attach_driver+0x7e/0xc0 bus_for_each_drv+0x7f/0xd0 __device_attach+0xaa/0x1a0 bus_probe_device+0x8b/0xa0 device_add+0x62e/0x810 usb_set_configuration+0x65d/0x990 usb_generic_driver_probe+0x4b/0x70 usb_probe_device+0x36/0xd0 The cause of this error is that the device has two interfaces, and the hub driver binds to interface 1 instead of interface 0, which is where usb_hub_to_struct_hub() looks. We can prevent the problem from occurring by refusing to accept hub devices that violate the USB spec by having more than one configuration or interface.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
12.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel* <6.1.129
linuxlinux_kernel*≥6.2  –  <6.6.79
linuxlinux_kernel*≥6.7  –  <6.12.16
linuxlinux_kernel*≥6.13  –  <6.13.4
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any

References 12

  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-265688.html
  • cert-portal.siemens.com https://cert-portal.siemens.com/productcert/html/ssa-503939.html
  • git.kernel.org https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218
  • git.kernel.org https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566
  • git.kernel.org https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c
  • git.kernel.org https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e
    Patch