Medium 5.5Published May 1, 2026

CVE-2026-31754usb: cdns3: gadget: fix state inconsistency on gadget init failure

Updated under an hour ago (Oct 27, 2026, 11:40 PM ET)

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In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix state inconsistency on gadget init failure When cdns3_gadget_start() fails, the DRD hardware is left in gadget mode while software state remains INACTIVE, creating hardware/software state inconsistency. When switching to host mode via sysfs: echo host > /sys/class/usb_role/13180000.usb-role-switch/role The role state is not set to CDNS_ROLE_STATE_ACTIVE due to the error, so cdns_role_stop() skips cleanup because state is still INACTIVE. This violates the DRD controller design specification (Figure22), which requires returning to idle state before switching roles. This leads to a synchronous external abort in xhci_gen_setup() when setting up the host controller: [ 516.440698] configfs-gadget 13180000.usb: failed to start g1: -19 [ 516.442035] cdns-usb3 13180000.usb: Failed to add gadget [ 516.443278] cdns-usb3 13180000.usb: set role 2 has failed ... [ 1301.375722] xhci-hcd xhci-hcd.1.auto: xHCI Host Controller [ 1301.377716] Internal error: synchronous external abort: 96000010 [#1] PREEMPT SMP [ 1301.382485] pc : xhci_gen_setup+0xa4/0x408 [ 1301.393391] backtrace: ... xhci_gen_setup+0xa4/0x408 <-- CRASH xhci_plat_setup+0x44/0x58 usb_add_hcd+0x284/0x678 ... cdns_role_set+0x9c/0xbc <-- Role switch Fix by calling cdns_drd_gadget_off() in the error path to properly clean up the DRD gadget state.

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: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before fb7110a052467098967284ef14d306810b354937; 7733f6c32e36ff9d7adadf40001039bf219b1cbe builds before 9b1d301fbae837bf6979a19030b81d869bb15f7a; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before cfca84f5986afceb63a3adf39d4a98e915aebbc2; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f; 7733f6c32e36ff9d7adadf40001039bf219b1cbe builds before 5a85599ca4d2584d89dc69f4fc49303b75a42338; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before c32f8748d70c8fc77676ad92ed76cede17bf2c48	CNA record
linux linux_kernel linux:linux_kernel	from 5.4 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; from 6.7 before 6.12.81; from 6.13 before 6.18.22; from 6.19 before 6.19.12; 7.0; 7.0; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/fb7110a052467098967284ef14d306810b354937	patch
https://git.kernel.org/stable/c/9b1d301fbae837bf6979a19030b81d869bb15f7a	patch
https://git.kernel.org/stable/c/cfca84f5986afceb63a3adf39d4a98e915aebbc2	patch
https://git.kernel.org/stable/c/c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f	patch
https://git.kernel.org/stable/c/5a85599ca4d2584d89dc69f4fc49303b75a42338	patch
https://git.kernel.org/stable/c/b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f	patch
https://git.kernel.org/stable/c/c32f8748d70c8fc77676ad92ed76cede17bf2c48	patch

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.