{"id":"CVE-2026-64329","state":"PUBLISHED","title":"usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove","description":"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->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.","publishedAt":"2026-07-25T08:49:57.098Z","updatedAt":"2026-08-17T04:53:31.661Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"f1adeb1ff8bef1467d6961059810795d02bbad5d","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"99381e762273a2410a3f0216000be32b013c0ea9","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"1a160076d3d0dcd4a98a4599ad96eec0790b099b","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"c32df11147822d22facee8fa30c2e8971d12f426","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"86c9ee928c4a370e323e432aaf8dca79c4ba7c85","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"f5c772b76bbd95de8be51cf849c6098f6af6fcf9","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"dbb500bad02146b388041877574829016591ddc8","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"1f0bdc2884b67de337215079bba166df0cdf4ac5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/ucsi_ccg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/ucsi/ucsi_ccg.c"]}],"references":["https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d","https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9","https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b","https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426","https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85","https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9","https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8","https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64329.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64329","state":"PUBLISHED","datePublished":"2026-07-25T08:49:57.098Z","dateUpdated":"2026-08-17T04:53:31.661Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.780Z"},"containers":{"cna":{"title":"usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove","descriptions":[{"lang":"en","value":"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->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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"f1adeb1ff8bef1467d6961059810795d02bbad5d","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"99381e762273a2410a3f0216000be32b013c0ea9","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"1a160076d3d0dcd4a98a4599ad96eec0790b099b","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"c32df11147822d22facee8fa30c2e8971d12f426","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"86c9ee928c4a370e323e432aaf8dca79c4ba7c85","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"f5c772b76bbd95de8be51cf849c6098f6af6fcf9","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"dbb500bad02146b388041877574829016591ddc8","versionType":"git"},{"version":"e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2","status":"affected","lessThan":"1f0bdc2884b67de337215079bba166df0cdf4ac5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/typec/ucsi/ucsi_ccg.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","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/ucsi/ucsi_ccg.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d"},{"url":"https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9"},{"url":"https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b"},{"url":"https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426"},{"url":"https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85"},{"url":"https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9"},{"url":"https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8"},{"url":"https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:53:31.661Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}