{"id":"CVE-2026-90027","state":"PUBLISHED","title":"usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop\n\ncc_debounce_dwork is queued from the set_cc() and start_toggling()\ncallbacks, which run from TCPM's kthread worker.  port_stop() returns\nbefore tcpm_unregister_port() destroys that worker.  Flushing the worker\nduring unregister may therefore run a callback which queues the delayed\nwork after port_stop() has returned.\n\nThe delayed work can then run after devres has freed pmic_typec_port.\n\nUse disable_delayed_work_sync() in port_stop() to cancel a pending\ninstance and prevent the TCPM callbacks from queueing another one.\n\nThis issue was found by an in-house static analysis tool.","publishedAt":"2026-09-16T10:33:29.700Z","updatedAt":"2026-10-19T08:56:43.664Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"4359b5f95c93a4658e08368fa6fab9d89eb98447","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"c614d7c44ca7fb78867ba46b233acdb59287e8c8","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"1ab669c2b44e1040ddfab7cd7f717aad580d17aa","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"263f7d61a4201cde16849b2d016251806e7418be","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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/typec/tcpm/qcom/qcom_pmic_typec_port.c"]}],"references":["https://git.kernel.org/stable/c/4359b5f95c93a4658e08368fa6fab9d89eb98447","https://git.kernel.org/stable/c/c614d7c44ca7fb78867ba46b233acdb59287e8c8","https://git.kernel.org/stable/c/1ab669c2b44e1040ddfab7cd7f717aad580d17aa","https://git.kernel.org/stable/c/263f7d61a4201cde16849b2d016251806e7418be"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90027.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90027","state":"PUBLISHED","datePublished":"2026-09-16T10:33:29.700Z","dateUpdated":"2026-10-19T08:56:43.664Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.782Z"},"containers":{"cna":{"title":"usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop\n\ncc_debounce_dwork is queued from the set_cc() and start_toggling()\ncallbacks, which run from TCPM's kthread worker.  port_stop() returns\nbefore tcpm_unregister_port() destroys that worker.  Flushing the worker\nduring unregister may therefore run a callback which queues the delayed\nwork after port_stop() has returned.\n\nThe delayed work can then run after devres has freed pmic_typec_port.\n\nUse disable_delayed_work_sync() in port_stop() to cancel a pending\ninstance and prevent the TCPM callbacks from queueing another one.\n\nThis issue was found by an in-house static analysis tool."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"4359b5f95c93a4658e08368fa6fab9d89eb98447","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"c614d7c44ca7fb78867ba46b233acdb59287e8c8","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"1ab669c2b44e1040ddfab7cd7f717aad580d17aa","versionType":"git"},{"version":"a4422ff221429c600c3dc5d0394fb3738b89d040","status":"affected","lessThan":"263f7d61a4201cde16849b2d016251806e7418be","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/tcpm/qcom/qcom_pmic_typec_port.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.5","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","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/typec/tcpm/qcom/qcom_pmic_typec_port.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/4359b5f95c93a4658e08368fa6fab9d89eb98447"},{"url":"https://git.kernel.org/stable/c/c614d7c44ca7fb78867ba46b233acdb59287e8c8"},{"url":"https://git.kernel.org/stable/c/1ab669c2b44e1040ddfab7cd7f717aad580d17aa"},{"url":"https://git.kernel.org/stable/c/263f7d61a4201cde16849b2d016251806e7418be"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The use-after-free is reached on Qualcomm PMIC Type-C platform-driver teardown (sysfs unbind, rmmod, or probe-error unwind after TCPM is registered), not by parsing USB-C/PD traffic from a plugged partner. That matches other USB gadget/UDC and onboard Type-C teardown UAFs scored Local and is higher severity than Physical.\nAC:L - An attacker who initiates remove controls both sides: TCPM set_cc/start_toggling queue the 2ms cc_debounce_dwork, and kthread_destroy_worker() in tcpm_unregister_port() can run those callbacks after port_stop() returns, re-queueing work that then runs after devres frees pmic_typec_port. Use-after-free bugs are AC:L unless the attacker cannot influence the race.\nPR:L - Highest reasonable exposure is a local account on Qualcomm phones, automotive, and embedded boards that manage the Type-C/USB stack, where platform unbind or USB HAL access is often delegated beyond init-namespace root. Uncertain Low versus High, so Low per the overestimate rule.\nUI:N - The attacker initiates driver unbind, module unload, or a failing re-probe themselves; no separate victim action such as plugging a USB-C cable, mounting a filesystem, or opening a device node is required.\nS:U - The use-after-free corrupts the host kernel pmic_typec_port heap object within the same OS security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - qcom_pmic_typec_port_cc_debounce() recovers the freed pmic_typec_port via container_of and reads its spinlock and device pointer; per CNA guidance a use-after-free enables arbitrary kernel memory disclosure.\nI:H - The same delayed work writes debouncing_cc and performs spin_lock/unlock on the freed object, and the pending delayed_work lives inside pmic_typec_port, so heap spray yields an arbitrary write or workqueue function-pointer hijack.\nA:H - Use-after-free of pmic_typec_port from system-wq delayed work after remove causes a kernel oops or panic even without a full exploit, so availability impact is High."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:56:43.664Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.5","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}