{"id":"CVE-2026-64329","summary":"usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove\n\nThe threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(),\nwhich on a connector-change event calls ucsi_connector_change() and\nschedules connector work.  In ucsi_ccg_remove(), ucsi_destroy() frees\nuc-\u003eucsi (kfree) before free_irq() is called, so a handler invocation\nalready in flight may access the freed object after ucsi_destroy().\n\n  CPU 0 (remove)            | CPU 1 (threaded IRQ)\n    ucsi_destroy(uc-\u003eucsi)  |   ccg_irq_handler()\n      kfree(ucsi) // FREE   |     ucsi_notify_common(uc-\u003eucsi) // USE\n\nMove free_irq() before ucsi_destroy() in the remove path.  It is kept\nafter ucsi_unregister(): ucsi_unregister() cancels connector work whose\nhandler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(),\nwhich waits for a completion that is signalled from the IRQ handler, so\nthe IRQ must stay active until that work has been cancelled.\n\nThe probe error path already orders free_irq() before ucsi_destroy().\n\nThis bug was found by static analysis.","modified":"2026-07-27T04:03:19.359060682Z","published":"2026-07-25T08:49:57.098Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64329.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85"},{"type":"WEB","url":"https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64329.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64329"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2"},{"fixed":"f1adeb1ff8bef1467d6961059810795d02bbad5d"},{"fixed":"99381e762273a2410a3f0216000be32b013c0ea9"},{"fixed":"1a160076d3d0dcd4a98a4599ad96eec0790b099b"},{"fixed":"c32df11147822d22facee8fa30c2e8971d12f426"},{"fixed":"86c9ee928c4a370e323e432aaf8dca79c4ba7c85"},{"fixed":"f5c772b76bbd95de8be51cf849c6098f6af6fcf9"},{"fixed":"dbb500bad02146b388041877574829016591ddc8"},{"fixed":"1f0bdc2884b67de337215079bba166df0cdf4ac5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64329.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.261"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.212"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64329.json"}}],"schema_version":"1.7.5"}