usb: cdns3: gadget: fix state inconsistency on gadget init failure

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Summary

CVECVE-2026-31754
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:38 UTC
Updated2026-05-08 18:49:44 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000300000 probability, percentile 0.085620000 (date 2026-05-05)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe fb7110a052467098967284ef14d306810b354937 git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe 9b1d301fbae837bf6979a19030b81d869bb15f7a git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe cfca84f5986afceb63a3adf39d4a98e915aebbc2 git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe 5a85599ca4d2584d89dc69f4fc49303b75a42338 git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f git Not specified
CNA Linux Linux affected 7733f6c32e36ff9d7adadf40001039bf219b1cbe c32f8748d70c8fc77676ad92ed76cede17bf2c48 git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.168 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.134 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.81 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c7e475ae3a5593c5db21b3b7dca4ba8bdac9b47f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c32f8748d70c8fc77676ad92ed76cede17bf2c48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9b1d301fbae837bf6979a19030b81d869bb15f7a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cfca84f5986afceb63a3adf39d4a98e915aebbc2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5a85599ca4d2584d89dc69f4fc49303b75a42338 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b490f0e477d26d29ed51e5dc47e3b9bd31bcb49f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/fb7110a052467098967284ef14d306810b354937 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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