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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-31756

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In 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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd to < e9fcca3e87463013d595c65c2189ffaa32ad3b50affected
  • 1ac826cebc2776f91569f2aa9c9c3da2375d2096 to < 8ffe31acb3b77a30ae34d01719a269881569fb7faffected
  • 41732f9febdccb4f9b87c13cb915d717d68ccafd to < beab10429439e20708036a66fb0d97ffb79da6a1affected
  • ba78c2b3254c4a458c01776612e8a573e12f8d26 to < 4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4affected
  • af076a41f8a28faf9ceb9dd2d88aef2c202ef39a to < 61937f686290494998236c680ce0836b8dd63a3faffected
  • af076a41f8a28faf9ceb9dd2d88aef2c202ef39a to < 51b62286fc668c6eb74dee7624ec0beec3c5a0edaffected
  • af076a41f8a28faf9ceb9dd2d88aef2c202ef39a to < 9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557aaffected
  • b39c203690fa1678daecc60f347e43c8b593b969affected
  • 5.15.187 to < 5.15.203affected
  • 6.1.143 to < 6.1.168affected
  • 6.6.96 to < 6.6.134affected
  • 6.12.36 to < 6.12.81affected
  • 6.15.5 to < 6.16affected

Linux Linux

Default version status: affected

  • 6.16affected
  • 0 to < 6.16unaffected
  • 5.15.203 to ≤ 5.15.*unaffected
  • 6.1.168 to ≤ 6.1.*unaffected
  • 6.6.134 to ≤ 6.6.*unaffected
  • 6.12.81 to ≤ 6.12.*unaffected
  • 6.18.22 to ≤ 6.18.*unaffected
  • 6.19.12 to ≤ 6.19.*unaffected
  • 7.0 to ≤ *unaffected

References