usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()

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Summary

CVECVE-2026-31756
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:38 UTC
Updated2026-05-08 18:30:40 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop() dwc2_gadget_exit_clock_gating() internally calls call_gadget() macro, which expects hsotg->lock to be held since it does spin_unlock/spin_lock around the gadget driver callback invocation. However, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating() without holding the lock. This leads to: - spin_unlock on a lock that is not held (undefined behavior) - The lock remaining held after dwc2_gadget_exit_clock_gating() returns, causing a deadlock when spin_lock_irqsave() is called later in the same function. Fix this by acquiring hsotg->lock before calling dwc2_gadget_exit_clock_gating() and releasing it afterwards, which satisfies the locking requirement of the call_gadget() macro.

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: 0.000240000 probability, percentile 0.068060000 (date 2026-05-05)

Problem Types: CWE-667

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 5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd e9fcca3e87463013d595c65c2189ffaa32ad3b50 git Not specified
CNA Linux Linux affected 1ac826cebc2776f91569f2aa9c9c3da2375d2096 8ffe31acb3b77a30ae34d01719a269881569fb7f git Not specified
CNA Linux Linux affected 41732f9febdccb4f9b87c13cb915d717d68ccafd beab10429439e20708036a66fb0d97ffb79da6a1 git Not specified
CNA Linux Linux affected ba78c2b3254c4a458c01776612e8a573e12f8d26 4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4 git Not specified
CNA Linux Linux affected af076a41f8a28faf9ceb9dd2d88aef2c202ef39a 61937f686290494998236c680ce0836b8dd63a3f git Not specified
CNA Linux Linux affected af076a41f8a28faf9ceb9dd2d88aef2c202ef39a 51b62286fc668c6eb74dee7624ec0beec3c5a0ed git Not specified
CNA Linux Linux affected af076a41f8a28faf9ceb9dd2d88aef2c202ef39a 9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a git Not specified
CNA Linux Linux affected b39c203690fa1678daecc60f347e43c8b593b969 git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 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/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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