{"id":"CVE-2026-31756","state":"PUBLISHED","title":"usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()\n\ndwc2_gadget_exit_clock_gating() internally calls call_gadget() macro,\nwhich expects hsotg->lock to be held since it does spin_unlock/spin_lock\naround the gadget driver callback invocation.\n\nHowever, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating()\nwithout holding the lock. This leads to:\n - spin_unlock on a lock that is not held (undefined behavior)\n - The lock remaining held after dwc2_gadget_exit_clock_gating() returns,\n   causing a deadlock when spin_lock_irqsave() is called later in the\n   same function.\n\nFix this by acquiring hsotg->lock before calling\ndwc2_gadget_exit_clock_gating() and releasing it afterwards, which\nsatisfies the locking requirement of the call_gadget() macro.","publishedAt":"2026-05-01T14:14:47.000Z","updatedAt":"2026-05-23T16:05:53.039Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd","status":"affected","lessThan":"e9fcca3e87463013d595c65c2189ffaa32ad3b50","versionType":"git"},{"version":"1ac826cebc2776f91569f2aa9c9c3da2375d2096","status":"affected","lessThan":"8ffe31acb3b77a30ae34d01719a269881569fb7f","versionType":"git"},{"version":"41732f9febdccb4f9b87c13cb915d717d68ccafd","status":"affected","lessThan":"beab10429439e20708036a66fb0d97ffb79da6a1","versionType":"git"},{"version":"ba78c2b3254c4a458c01776612e8a573e12f8d26","status":"affected","lessThan":"4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"61937f686290494998236c680ce0836b8dd63a3f","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"51b62286fc668c6eb74dee7624ec0beec3c5a0ed","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a","versionType":"git"},{"version":"b39c203690fa1678daecc60f347e43c8b593b969","status":"affected","versionType":"git"},{"version":"5.15.187","status":"affected","lessThan":"5.15.203","versionType":"semver"},{"version":"6.1.143","status":"affected","lessThan":"6.1.168","versionType":"semver"},{"version":"6.6.96","status":"affected","lessThan":"6.6.134","versionType":"semver"},{"version":"6.12.36","status":"affected","lessThan":"6.12.81","versionType":"semver"},{"version":"6.15.5","status":"affected","lessThan":"6.16","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc2/gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc2/gadget.c"]}],"references":["https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50","https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f","https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1","https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f","https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed","https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31756.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31756","state":"PUBLISHED","datePublished":"2026-05-01T14:14:47.000Z","dateUpdated":"2026-05-23T16:05:53.039Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.139Z"},"containers":{"cna":{"title":"usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()\n\ndwc2_gadget_exit_clock_gating() internally calls call_gadget() macro,\nwhich expects hsotg->lock to be held since it does spin_unlock/spin_lock\naround the gadget driver callback invocation.\n\nHowever, dwc2_hsotg_udc_stop() calls dwc2_gadget_exit_clock_gating()\nwithout holding the lock. This leads to:\n - spin_unlock on a lock that is not held (undefined behavior)\n - The lock remaining held after dwc2_gadget_exit_clock_gating() returns,\n   causing a deadlock when spin_lock_irqsave() is called later in the\n   same function.\n\nFix this by acquiring hsotg->lock before calling\ndwc2_gadget_exit_clock_gating() and releasing it afterwards, which\nsatisfies the locking requirement of the call_gadget() macro."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd","status":"affected","lessThan":"e9fcca3e87463013d595c65c2189ffaa32ad3b50","versionType":"git"},{"version":"1ac826cebc2776f91569f2aa9c9c3da2375d2096","status":"affected","lessThan":"8ffe31acb3b77a30ae34d01719a269881569fb7f","versionType":"git"},{"version":"41732f9febdccb4f9b87c13cb915d717d68ccafd","status":"affected","lessThan":"beab10429439e20708036a66fb0d97ffb79da6a1","versionType":"git"},{"version":"ba78c2b3254c4a458c01776612e8a573e12f8d26","status":"affected","lessThan":"4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"61937f686290494998236c680ce0836b8dd63a3f","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"51b62286fc668c6eb74dee7624ec0beec3c5a0ed","versionType":"git"},{"version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","status":"affected","lessThan":"9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a","versionType":"git"},{"version":"b39c203690fa1678daecc60f347e43c8b593b969","status":"affected","versionType":"git"},{"version":"5.15.187","status":"affected","lessThan":"5.15.203","versionType":"semver"},{"version":"6.1.143","status":"affected","lessThan":"6.1.168","versionType":"semver"},{"version":"6.6.96","status":"affected","lessThan":"6.6.134","versionType":"semver"},{"version":"6.12.36","status":"affected","lessThan":"6.12.81","versionType":"semver"},{"version":"6.15.5","status":"affected","lessThan":"6.16","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc2/gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.16","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.134","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.81","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.22","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.12","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc2/gadget.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50"},{"url":"https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f"},{"url":"https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1"},{"url":"https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4"},{"url":"https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f"},{"url":"https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed"},{"url":"https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:05:53.039Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.187","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.143","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.96","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.36","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}