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CVE-2025-21776— USB: hub: Ignore non-compliant devices with too many configs or interfaces

EPSS 0.01% · P3

Affected Version Matrix 18

VendorProductVersion RangeStatus
LinuxLinuxd2123fd9e1a56b8006986ed37e0aaf93ef0dd978< 49f077106fa07919a6a6dda99bb490dd1d1a8218affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< d343fe0fad5c1d689775f2dda24a85ce98e29566affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< d3a67adb365cdfdac4620daf38a82e57ca45806caffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< c3720b04df84b5459050ae4e03ec7d545652f897affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< e905a0fca7bff0855d312c16f71e60e1773b393eaffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< 62d8f4c5454dd39aded4f343720d1c5a1803cfefaffected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< 5b9778e1fe715700993ce436c152dc3b7df0b490affected
d2123fd9e1a56b8006986ed37e0aaf93ef0dd978< 2240fed37afbcdb5e8b627bc7ad986891100e05daffected
… +10 more rows
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I. Basic Information for CVE-2025-21776

Vulnerability Information
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Vulnerability Title
USB: hub: Ignore non-compliant devices with too many configs or interfaces
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于USB hub未正确处理非合规设备，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux d2123fd9e1a56b8006986ed37e0aaf93ef0dd978 ~ 49f077106fa07919a6a6dda99bb490dd1d1a8218 -
LinuxLinux 3.9 -

II. Public POCs for CVE-2025-21776

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III. Intelligence Information for CVE-2025-21776

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Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-217567.8 HIGHvsock: Keep the binding until socket destruction
CVE-2025-21770iommu: Fix potential memory leak in iopf_queue_remove_device()
CVE-2025-21761openvswitch: use RCU protection in ovs_vport_cmd_fill_info()
CVE-2025-21763neighbour: use RCU protection in __neigh_notify()
CVE-2025-21762arp: use RCU protection in arp_xmit()
CVE-2025-21764ndisc: use RCU protection in ndisc_alloc_skb()
CVE-2025-21765ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21766ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21767clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context
CVE-2025-21769ptp: vmclock: Add .owner to vmclock_miscdev_fops
CVE-2025-21768net: ipv6: fix dst ref loops in rpl, seg6 and ioam6 lwtunnels
CVE-2025-21771sched_ext: Fix incorrect autogroup migration detection
CVE-2025-21777ring-buffer: Validate the persistent meta data subbuf array
CVE-2025-21783gpiolib: Fix crash on error in gpiochip_get_ngpios()
CVE-2025-21781batman-adv: fix panic during interface removal
CVE-2025-21780drm/amdgpu: avoid buffer overflow attach in smu_sys_set_pp_table()
CVE-2025-21779KVM: x86: Reject Hyper-V's SEND_IPI hypercalls if local APIC isn't in-kernel
CVE-2025-21778tracing: Do not allow mmap() of persistent ring buffer
CVE-2025-21775can: ctucanfd: handle skb allocation failure
CVE-2025-21773can: etas_es58x: fix potential NULL pointer dereference on udev->serial

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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