{"api_version":"1","generated_at":"2026-07-28T12:19:27+00:00","cve":"CVE-2026-64346","urls":{"html":"https://cve.report/CVE-2026-64346","api":"https://cve.report/api/cve/CVE-2026-64346.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64346","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64346"},"summary":{"title":"usb: gadget: udc: Fix use-after-free in gadget_match_driver","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: Fix use-after-free in gadget_match_driver\n\nThe udc structure acts as the management structure for the gadget,\nbut their lifecycles are decoupled. A race condition exists where\nusb_del_gadget() frees the udc memory (e.g., via mode-switch work)\nwhile gadget_match_driver() concurrently accesses the freed udc memory\n(e.g., via configfs), causing a Use-After-Free (UAF) that triggers a\nNULL pointer dereference when the freed memory is zeroed:\n\n[39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140\n[39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60\n...\n[39430.911890][ T1171]  usb_gadget_register_driver_owner+0x50/0xf8\n[39430.911910][ T1171]  gadget_dev_desc_UDC_store+0xf4/0x140\n[39430.931308][ T1171]  configfs_write_iter+0xec/0x134\n\n[39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode\n[39430.957287][ T1171]  dwc3_gadget_exit+0x34/0x8c\n[39430.957304][ T1171]  __dwc3_set_mode+0xc0/0x664\n\nFix this by ensuring the udc structure remains allocated until the\ngadget is released. To achieve this, introduce a new\nusb_gadget_release() routine to the core. When the gadget is added,\nusb_add_gadget() stores the gadget's release routine in the udc\nstructure and takes a reference to the udc. When the gadget is\nreleased, usb_gadget_release() drops the reference to the udc and\nthen calls the gadget's release routine.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:16","updated_at":"2026-07-27 05:16:42"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194","name":"https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2","name":"https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea","name":"https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52","name":"https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1","name":"https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4","name":"https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f845852a5a8914277031f47d8de0f350fef52405","name":"https://git.kernel.org/stable/c/f845852a5a8914277031f47d8de0f350fef52405","refsource":"MITRE","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64346","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64346","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 50eeb8e8a4f389efc91b93cff14a683e714ec194 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 7a5214dae906d9f58e07bc4995e8181ee74439f4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 d026f71df141c9b064ff32a78af5391a31ef75c2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 b52476a83d9e12df00765359d728a875b128bef1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 54fa390aae393eb130f307a85562e3001cc39a52 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fc274c1e997314bf47f6a62c79b5d7e554ed59c4 67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.96 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.39 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.4 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"64346","cve":"CVE-2026-64346","epss":"0.002060000","percentile":"0.107990000","score_date":"2026-07-27","updated_at":"2026-07-28 00:07:44"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/gadget/udc/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"50eeb8e8a4f389efc91b93cff14a683e714ec194","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"},{"lessThan":"7a5214dae906d9f58e07bc4995e8181ee74439f4","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"},{"lessThan":"d026f71df141c9b064ff32a78af5391a31ef75c2","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"},{"lessThan":"b52476a83d9e12df00765359d728a875b128bef1","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"},{"lessThan":"54fa390aae393eb130f307a85562e3001cc39a52","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"},{"lessThan":"67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea","status":"affected","version":"fc274c1e997314bf47f6a62c79b5d7e554ed59c4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/gadget/udc/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.96","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.39","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.96","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.39","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.4","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc3","versionStartIncluding":"5.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: Fix use-after-free in gadget_match_driver\n\nThe udc structure acts as the management structure for the gadget,\nbut their lifecycles are decoupled. A race condition exists where\nusb_del_gadget() frees the udc memory (e.g., via mode-switch work)\nwhile gadget_match_driver() concurrently accesses the freed udc memory\n(e.g., via configfs), causing a Use-After-Free (UAF) that triggers a\nNULL pointer dereference when the freed memory is zeroed:\n\n[39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140\n[39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60\n...\n[39430.911890][ T1171]  usb_gadget_register_driver_owner+0x50/0xf8\n[39430.911910][ T1171]  gadget_dev_desc_UDC_store+0xf4/0x140\n[39430.931308][ T1171]  configfs_write_iter+0xec/0x134\n\n[39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode\n[39430.957287][ T1171]  dwc3_gadget_exit+0x34/0x8c\n[39430.957304][ T1171]  __dwc3_set_mode+0xc0/0x664\n\nFix this by ensuring the udc structure remains allocated until the\ngadget is released. To achieve this, introduce a new\nusb_gadget_release() routine to the core. When the gadget is added,\nusb_add_gadget() stores the gadget's release routine in the udc\nstructure and takes a reference to the udc. When the gadget is\nreleased, usb_gadget_release() drops the reference to the udc and\nthen calls the gadget's release routine."}],"providerMetadata":{"dateUpdated":"2026-07-27T04:37:30.473Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/50eeb8e8a4f389efc91b93cff14a683e714ec194"},{"url":"https://git.kernel.org/stable/c/7a5214dae906d9f58e07bc4995e8181ee74439f4"},{"url":"https://git.kernel.org/stable/c/d026f71df141c9b064ff32a78af5391a31ef75c2"},{"url":"https://git.kernel.org/stable/c/b52476a83d9e12df00765359d728a875b128bef1"},{"url":"https://git.kernel.org/stable/c/54fa390aae393eb130f307a85562e3001cc39a52"},{"url":"https://git.kernel.org/stable/c/67e511d2989eb1c8c588b599ce2fcc6bb8e6f7ea"}],"title":"usb: gadget: udc: Fix use-after-free in gadget_match_driver","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64346","datePublished":"2026-07-25T08:50:07.680Z","dateReserved":"2026-07-19T15:36:31.782Z","dateUpdated":"2026-07-27T04:37:30.473Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:16","lastModifiedDate":"2026-07-27 05:16:42","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"64346","Ordinal":"1","Title":"usb: gadget: udc: Fix use-after-free in gadget_match_driver","CVE":"CVE-2026-64346","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64346","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: Fix use-after-free in gadget_match_driver\n\nThe udc structure acts as the management structure for the gadget,\nbut their lifecycles are decoupled. A race condition exists where\nusb_del_gadget() frees the udc memory (e.g., via mode-switch work)\nwhile gadget_match_driver() concurrently accesses the freed udc memory\n(e.g., via configfs), causing a Use-After-Free (UAF) that triggers a\nNULL pointer dereference when the freed memory is zeroed:\n\n[39430.908615][ T1171] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[39430.911397][ T1171] pc : __pi_strcmp+0x20/0x140\n[39430.911441][ T1171] lr : gadget_match_driver+0x34/0x60\n...\n[39430.911890][ T1171]  usb_gadget_register_driver_owner+0x50/0xf8\n[39430.911910][ T1171]  gadget_dev_desc_UDC_store+0xf4/0x140\n[39430.931308][ T1171]  configfs_write_iter+0xec/0x134\n\n[39430.957058][ T1171] Workqueue: events_freezable __dwc3_set_mode\n[39430.957287][ T1171]  dwc3_gadget_exit+0x34/0x8c\n[39430.957304][ T1171]  __dwc3_set_mode+0xc0/0x664\n\nFix this by ensuring the udc structure remains allocated until the\ngadget is released. To achieve this, introduce a new\nusb_gadget_release() routine to the core. When the gadget is added,\nusb_add_gadget() stores the gadget's release routine in the udc\nstructure and takes a reference to the udc. When the gadget is\nreleased, usb_gadget_release() drops the reference to the udc and\nthen calls the gadget's release routine.","Type":"Description","Title":"usb: gadget: udc: Fix use-after-free in gadget_match_driver"}]}}}