CVE-2025-21776USB: hub: Ignore non-compliant devices with too many configs or interfaces
- 5.5MediumCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 79% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 2 months later
· 2 months later
Published
- 21 months later
· 21 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < 49f077106fa07919a6a6dda99bb490dd1d1a8218
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < d343fe0fad5c1d689775f2dda24a85ce98e29566
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < d3a67adb365cdfdac4620daf38a82e57ca45806c
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < c3720b04df84b5459050ae4e03ec7d545652f897
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < e905a0fca7bff0855d312c16f71e60e1773b393e
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < 62d8f4c5454dd39aded4f343720d1c5a1803cfef
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < 5b9778e1fe715700993ce436c152dc3b7df0b490
- affected d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 – < 2240fed37afbcdb5e8b627bc7ad986891100e05d
- affected 3.9
- unaffected < 3.9
- unaffected 5.4.291 – ≤ 5.4.*
- unaffected 5.10.235 – ≤ 5.10.*
- unaffected 5.15.179 – ≤ 5.15.*
- unaffected 6.1.129 – ≤ 6.1.*
- unaffected 6.6.79 – ≤ 6.6.*
- unaffected 6.12.16 – ≤ 6.12.*
- unaffected 6.13.4 – ≤ 6.13.*
- unaffected 6.14 – ≤ *
References
References13
- https://git.kernel.org/stable/c/49f077106fa07919a6a6dda99bb490dd1d1a8218 (opens in a new tab)
- https://git.kernel.org/stable/c/d343fe0fad5c1d689775f2dda24a85ce98e29566 (opens in a new tab)
- https://git.kernel.org/stable/c/d3a67adb365cdfdac4620daf38a82e57ca45806c (opens in a new tab)
- https://git.kernel.org/stable/c/c3720b04df84b5459050ae4e03ec7d545652f897 (opens in a new tab)
- https://git.kernel.org/stable/c/e905a0fca7bff0855d312c16f71e60e1773b393e (opens in a new tab)
- https://git.kernel.org/stable/c/62d8f4c5454dd39aded4f343720d1c5a1803cfef (opens in a new tab)
- https://git.kernel.org/stable/c/5b9778e1fe715700993ce436c152dc3b7df0b490 (opens in a new tab)
- https://git.kernel.org/stable/c/2240fed37afbcdb5e8b627bc7ad986891100e05d (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-503939.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-5149 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-21776)Record last updated .