{"id":"CVE-2026-98766","state":"PUBLISHED","title":"usb: gadget: aspeed-vhub: cancel wake work on device removal","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: aspeed-vhub: cancel wake work on device removal\n\nwake_work is armed from the gadget .wakeup callback to resume suspended\ndownstream ports, and it is never cancelled in ast_vhub_remove(), so a\nwork item queued before or during removal can run after devm has freed\nvhub and its ports, a use-after-free.\n\nCancelling the work alone is not sufficient: usb_gadget_wakeup() takes\nno lock and the unbind path never clears wakeup_en, so a remote-wakeup\nrequest in flight on another CPU can re-arm the work after the cancel\nand before vhub is freed.\n\nast_vhub_del_dev() already clears d->registered under vhub->lock before\nunregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup()\nonce d->registered is clear: the check and the schedule_work() are then\natomic against the unbind, so a wakeup that passed before the flag was\ncleared is drained by the cancel_work_sync() after the del_dev loop,\nand one that arrives later returns without arming. Also move INIT_WORK()\nto the top of ast_vhub_probe(), since the probe error path reuses\nast_vhub_remove() and would otherwise cancel a never-initialized work\nitem.\n\nThis issue was found by an in-house static analysis tool.","publishedAt":"2026-10-18T15:47:59.061Z","updatedAt":"2026-10-30T12:39:35.461Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"89b3fef8809ec1a9acf5f753eb89b9508d7e4466","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"3aed0c86afa7877d08722233a8b15e8c1ff8bcb8","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"552f580a18787cfbd83d28d7d76d584c29f2c4c2","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"0d39ac4f65f9357469518c70e42940e0d8b0e497","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"20388c8d1d74c203fec8194c45cd31afdfab934e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed-vhub/core.c","drivers/usb/gadget/udc/aspeed-vhub/dev.c","drivers/usb/gadget/udc/aspeed-vhub/hub.c","drivers/usb/gadget/udc/aspeed-vhub/vhub.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed-vhub/core.c","drivers/usb/gadget/udc/aspeed-vhub/dev.c","drivers/usb/gadget/udc/aspeed-vhub/hub.c","drivers/usb/gadget/udc/aspeed-vhub/vhub.h"]}],"references":["https://git.kernel.org/stable/c/89b3fef8809ec1a9acf5f753eb89b9508d7e4466","https://git.kernel.org/stable/c/3aed0c86afa7877d08722233a8b15e8c1ff8bcb8","https://git.kernel.org/stable/c/552f580a18787cfbd83d28d7d76d584c29f2c4c2","https://git.kernel.org/stable/c/0d39ac4f65f9357469518c70e42940e0d8b0e497","https://git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41","https://git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d","https://git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1","https://git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98766.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98766","state":"PUBLISHED","datePublished":"2026-10-18T15:47:59.061Z","dateUpdated":"2026-10-30T12:39:35.461Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.368Z"},"containers":{"cna":{"title":"usb: gadget: aspeed-vhub: cancel wake work on device removal","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: aspeed-vhub: cancel wake work on device removal\n\nwake_work is armed from the gadget .wakeup callback to resume suspended\ndownstream ports, and it is never cancelled in ast_vhub_remove(), so a\nwork item queued before or during removal can run after devm has freed\nvhub and its ports, a use-after-free.\n\nCancelling the work alone is not sufficient: usb_gadget_wakeup() takes\nno lock and the unbind path never clears wakeup_en, so a remote-wakeup\nrequest in flight on another CPU can re-arm the work after the cancel\nand before vhub is freed.\n\nast_vhub_del_dev() already clears d->registered under vhub->lock before\nunregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup()\nonce d->registered is clear: the check and the schedule_work() are then\natomic against the unbind, so a wakeup that passed before the flag was\ncleared is drained by the cancel_work_sync() after the del_dev loop,\nand one that arrives later returns without arming. Also move INIT_WORK()\nto the top of ast_vhub_probe(), since the probe error path reuses\nast_vhub_remove() and would otherwise cancel a never-initialized work\nitem.\n\nThis issue was found by an in-house static analysis tool."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"89b3fef8809ec1a9acf5f753eb89b9508d7e4466","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"3aed0c86afa7877d08722233a8b15e8c1ff8bcb8","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"552f580a18787cfbd83d28d7d76d584c29f2c4c2","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"0d39ac4f65f9357469518c70e42940e0d8b0e497","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1","versionType":"git"},{"version":"7ecca2a4080cb6b1fa174adc588fce9e9014c43c","status":"affected","lessThan":"20388c8d1d74c203fec8194c45cd31afdfab934e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed-vhub/core.c","drivers/usb/gadget/udc/aspeed-vhub/dev.c","drivers/usb/gadget/udc/aspeed-vhub/hub.c","drivers/usb/gadget/udc/aspeed-vhub/vhub.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/udc/aspeed-vhub/core.c","drivers/usb/gadget/udc/aspeed-vhub/dev.c","drivers/usb/gadget/udc/aspeed-vhub/hub.c","drivers/usb/gadget/udc/aspeed-vhub/vhub.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/89b3fef8809ec1a9acf5f753eb89b9508d7e4466"},{"url":"https://git.kernel.org/stable/c/3aed0c86afa7877d08722233a8b15e8c1ff8bcb8"},{"url":"https://git.kernel.org/stable/c/552f580a18787cfbd83d28d7d76d584c29f2c4c2"},{"url":"https://git.kernel.org/stable/c/0d39ac4f65f9357469518c70e42940e0d8b0e497"},{"url":"https://git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41"},{"url":"https://git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d"},{"url":"https://git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1"},{"url":"https://git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:35.461Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.18","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}