{"id":"CVE-2026-64329","title":"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 ca…","summary":"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 ca…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.5, < 5.10.261","linux_kernel >= 5.11, < 5.15.212","linux_kernel >= 5.16, < 6.1.178","linux_kernel >= 6.2, < 6.6.145","linux_kernel >= 6.7, < 6.12.96","linux_kernel >= 6.13, < 6.18.39","linux_kernel >= 6.19, < 7.1.4","linux_kernel = 7.2"],"patched":["linux_kernel 7.1.4"],"published":"2026-07-25","updated":"2026-09-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64329","references":[{"url":"https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00126,"epssPercentile":0.02599,"ingestedAt":"2026-09-05T13:39:56.332Z","slug":"CVE-2026-64329","body":"## Overview\n\nIn 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->ucsi (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->ucsi)  |   ccg_irq_handler()\n      kfree(ucsi) // FREE   |     ucsi_notify_common(uc->ucsi) // 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.\n\n## Affected\n\n- `linux_kernel >= 5.5, < 5.10.261`\n- `linux_kernel >= 5.11, < 5.15.212`\n- `linux_kernel >= 5.16, < 6.1.178`\n- `linux_kernel >= 6.2, < 6.6.145`\n- `linux_kernel >= 6.7, < 6.12.96`\n- `linux_kernel >= 6.13, < 6.18.39`\n- `linux_kernel >= 6.19, < 7.1.4`\n- `linux_kernel = 7.2`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.1.4`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}