{"api_version":"1","generated_at":"2026-07-04T00:05:51+00:00","cve":"CVE-2026-31756","urls":{"html":"https://cve.report/CVE-2026-31756","api":"https://cve.report/api/cve/CVE-2026-31756.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31756","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31756"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 15:16:38","updated_at":"2026-05-08 18:30:40"},"problem_types":["CWE-667"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a","name":"https://git.kernel.org/stable/c/9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1","name":"https://git.kernel.org/stable/c/beab10429439e20708036a66fb0d97ffb79da6a1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","name":"https://git.kernel.org/stable/c/4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f","name":"https://git.kernel.org/stable/c/61937f686290494998236c680ce0836b8dd63a3f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50","name":"https://git.kernel.org/stable/c/e9fcca3e87463013d595c65c2189ffaa32ad3b50","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed","name":"https://git.kernel.org/stable/c/51b62286fc668c6eb74dee7624ec0beec3c5a0ed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f","name":"https://git.kernel.org/stable/c/8ffe31acb3b77a30ae34d01719a269881569fb7f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31756","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31756","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd e9fcca3e87463013d595c65c2189ffaa32ad3b50 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1ac826cebc2776f91569f2aa9c9c3da2375d2096 8ffe31acb3b77a30ae34d01719a269881569fb7f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 41732f9febdccb4f9b87c13cb915d717d68ccafd beab10429439e20708036a66fb0d97ffb79da6a1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ba78c2b3254c4a458c01776612e8a573e12f8d26 4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.134 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.81 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.22 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.12 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"31756","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"31756","cve":"CVE-2026-31756","epss":"0.000240000","percentile":"0.068060000","score_date":"2026-05-05","updated_at":"2026-05-06 00:08:09"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/dwc2/gadget.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e9fcca3e87463013d595c65c2189ffaa32ad3b50","status":"affected","version":"5cb3cb3db317c58d50b68f3ca3bb8343ea9d1acd","versionType":"git"},{"lessThan":"8ffe31acb3b77a30ae34d01719a269881569fb7f","status":"affected","version":"1ac826cebc2776f91569f2aa9c9c3da2375d2096","versionType":"git"},{"lessThan":"beab10429439e20708036a66fb0d97ffb79da6a1","status":"affected","version":"41732f9febdccb4f9b87c13cb915d717d68ccafd","versionType":"git"},{"lessThan":"4ed9d2dd9f29828c311db6ec4b8e0d34bfd6d6a4","status":"affected","version":"ba78c2b3254c4a458c01776612e8a573e12f8d26","versionType":"git"},{"lessThan":"61937f686290494998236c680ce0836b8dd63a3f","status":"affected","version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","versionType":"git"},{"lessThan":"51b62286fc668c6eb74dee7624ec0beec3c5a0ed","status":"affected","version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","versionType":"git"},{"lessThan":"9bb4b5ed7f8c4f95cc556bdf042b0ba2fa13557a","status":"affected","version":"af076a41f8a28faf9ceb9dd2d88aef2c202ef39a","versionType":"git"},{"status":"affected","version":"b39c203690fa1678daecc60f347e43c8b593b969","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/dwc2/gadget.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.16"},{"lessThan":"6.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.203","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.168","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.134","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.81","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.22","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.203","versionStartIncluding":"5.15.187","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.168","versionStartIncluding":"6.1.143","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.134","versionStartIncluding":"6.6.96","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.81","versionStartIncluding":"6.12.36","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.22","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.12","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-05-01T14:14:47.000Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_udc_stop()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31756","datePublished":"2026-05-01T14:14:47.000Z","dateReserved":"2026-03-09T15:48:24.139Z","dateUpdated":"2026-05-01T14:14:47.000Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 15:16:38","lastModifiedDate":"2026-05-08 18:30:40","problem_types":["CWE-667"],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.187","versionEndExcluding":"5.15.203","matchCriteriaId":"47F2AD8D-1BF2-49F3-AB68-24C4630BAFD0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.143","versionEndExcluding":"6.1.168","matchCriteriaId":"7E908ADC-45DA-494F-9E71-A310F56EDCAF"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.96","versionEndExcluding":"6.6.134","matchCriteriaId":"E220ECC5-ECBC-4EFF-B943-1DEACE981592"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.36","versionEndExcluding":"6.12.81","matchCriteriaId":"0FFEF924-DF26-4B6A-B663-70084F25414E"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15.5","versionEndExcluding":"6.18.22","matchCriteriaId":"8F8BB240-724D-4162-8196-2D2F2C5C8724"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.12","matchCriteriaId":"0A2B9540-02D5-41B4-B16A-82AF66FD4F36"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*","matchCriteriaId":"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*","matchCriteriaId":"F666C8D8-6538-46D4-B318-87610DE64C34"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*","matchCriteriaId":"02259FDA-961B-47BC-AE7F-93D7EC6E90C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*","matchCriteriaId":"58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*","matchCriteriaId":"1D2315C0-D46F-4F85-9754-F9E5E11374A6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*","matchCriteriaId":"512EE3A8-A590-4501-9A94-5D4B268D6138"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31756","Ordinal":"1","Title":"usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_u","CVE":"CVE-2026-31756","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31756","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"usb: dwc2: gadget: Fix spin_lock/unlock mismatch in dwc2_hsotg_u"}]}}}