CVE-2025-21776USB: hub: Ignore non-compliant devices with too many configs or interfaces
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before 49f077106fa07919a6a6dda99bb490dd1d1a8218; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before d343fe0fad5c1d689775f2dda24a85ce98e29566; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before d3a67adb365cdfdac4620daf38a82e57ca45806c; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before c3720b04df84b5459050ae4e03ec7d545652f897; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before e905a0fca7bff0855d312c16f71e60e1773b393e; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before 62d8f4c5454dd39aded4f343720d1c5a1803cfef; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before 5b9778e1fe715700993ce436c152dc3b7df0b490; from d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 before 2240fed37afbcdb5e8b627bc7ad986891100e05d | CNA record |
Siemens SIMATIC S7-1500 TM MFP - BIOS siemens:simatic_s7_1500_tm_mfp_bios (from the name) | all versions | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | before 6.1.129; from 6.2 before 6.6.79; from 6.7 before 6.12.16; from 6.13 before 6.13.4; 6.14; 6.14 | NVD |
References
- https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218
- https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566
- https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c
- https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897patch
- https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393epatch
- https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfefpatch
- https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490patch
- https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05dpatch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-503939.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.