{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-64583", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-64583", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-08-06T07:06:25.335Z", "updatedAt": "2026-08-23T12:45:42.500Z", "importedAt": "2026-10-24T01:58:25.636Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "usb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: bdc: free IRQ and drain func_wake_notify before teardown\n\nThe Broadcom BDC UDC driver registers its IRQ handler with\ndevm_request_irq() in bdc_udc_init(), so the IRQ is released by devm\nonly after bdc_remove() returns. devm releases resources in reverse\nLIFO order, but bdc_remove() runs bdc_udc_exit() and bdc_hw_exit() ->\nbdc_mem_free() manually before returning: bdc_udc_exit() tears down\nindividual endpoint objects via bdc_free_ep(), while bdc_hw_exit() ->\nbdc_mem_free() frees and NULLs the DMA-coherent status-report ring\n(bdc->srr.sr_bds) and kfree()s bdc->bdc_ep_array. Both happen while\nthe IRQ handler (bdc_udc_interrupt, requested with IRQF_SHARED)\nremains deliverable in the window up to the post-remove devm\nfree_irq().\n\nOn receipt of a shared interrupt in that window, bdc_udc_interrupt()\ndereferences bdc->srr.sr_bds[bdc->srr.dqp_index] (NULL or freed DMA)\nand dispatches sr_handler callbacks that index into bdc_ep_array,\ncausing a NULL-deref or use-after-free.\n\nThe same window affects the delayed_work bdc->func_wake_notify, which is\narmed from the IRQ handler via bdc_sr_uspc() -> handle_link_state_change()\n-> schedule_delayed_work() and may self-rearm from its own callback\nbdc_func_wake_timer(). No cancel exists anywhere in the driver, so a\nqueued work item that fires after bdc_remove() returns and the bdc\nstructure is devm-freed dereferences freed memory.\n\nReplace devm_request_irq() with request_irq() and add an explicit\nfree_irq(bdc->irq, bdc) in bdc_remove(). Clear BDC_GIE before\nfree_irq() to stop the device from asserting interrupts, then\nfree_irq() drains any in-flight handler, then cancel_delayed_work_sync()\ndrains the func_wake_notify delayed work. This ordering ensures the\nIRQ handler and delayed work cannot interfere with the subsequent\nendpoint and DMA teardown in bdc_udc_exit() and bdc_hw_exit(). Wire the\nmatching free_irq() into the bdc_udc_init() error path so the IRQ is\nreleased on probe failure, and route the bdc_init_ep() failure through\nerr0 instead of returning directly.\n\nThis issue was found by an in-house static analysis tool.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "eac1107e54679db2df2c36d8bba3b66d3ab6cbcd" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "0b0b76e31b3991a899ae724eb97d359de0c0f1b1" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "3fe181952b8a1aeb167d4503c794c0f5050f08ed" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "1a1d7158420df6b8fa1efc0cdd6ab704801a4fc8" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "f6fc21ec7ccd83726ba766d73d0b8cc03e726475" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "dcf3e2f164435b5844706cb8eefef29ebee0eedb" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "d4964a74717107697999f48bcb4e80a9c0679a27" }, { "version": "efed421a94e62a7ddbc76acba4312b70e4be958f", "status": "affected", "versionType": "git", "lessThan": "0583f2fbf8f86ae3a0ce054f96783dd83e65d9bb" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "3.19", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "3.19" }, { "version": "5.10.266", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.216", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.183", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.148", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.101", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.6", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }