High 7.8Published Jul 25, 2026

CVE-2026-64329usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove

Updated under an hour ago (Oct 27, 2026, 8:50 AM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove The threaded IRQ handler ccg_irq_handler() calls ucsi_notify_common(), which on a connector-change event calls ucsi_connector_change() and schedules connector work. In ucsi_ccg_remove(), ucsi_destroy() frees uc->ucsi (kfree) before free_irq() is called, so a handler invocation already in flight may access the freed object after ucsi_destroy(). CPU 0 (remove) | CPU 1 (threaded IRQ) ucsi_destroy(uc->ucsi) | ccg_irq_handler() kfree(ucsi) // FREE | ucsi_notify_common(uc->ucsi) // USE Move free_irq() before ucsi_destroy() in the remove path. It is kept after ucsi_unregister(): ucsi_unregister() cancels connector work whose handler issues GET_CONNECTOR_STATUS through ucsi_send_command_common(), which waits for a completion that is signalled from the IRQ handler, so the IRQ must stay active until that work has been cancelled. The probe error path already orders free_irq() before ucsi_destroy(). This bug was found by static analysis.

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before f1adeb1ff8bef1467d6961059810795d02bbad5d; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before 99381e762273a2410a3f0216000be32b013c0ea9; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before 1a160076d3d0dcd4a98a4599ad96eec0790b099b; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before c32df11147822d22facee8fa30c2e8971d12f426; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before 86c9ee928c4a370e323e432aaf8dca79c4ba7c85; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before f5c772b76bbd95de8be51cf849c6098f6af6fcf9; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before dbb500bad02146b388041877574829016591ddc8; from e32fd989ac1c45f993fbe89ad0a89aa9ea6993d2 before 1f0bdc2884b67de337215079bba166df0cdf4ac5	CNA record
linux linux_kernel linux:linux_kernel	from 5.5 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4; 7.2; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/f1adeb1ff8bef1467d6961059810795d02bbad5d	patch
https://git.kernel.org/stable/c/99381e762273a2410a3f0216000be32b013c0ea9	patch
https://git.kernel.org/stable/c/1a160076d3d0dcd4a98a4599ad96eec0790b099b	patch
https://git.kernel.org/stable/c/c32df11147822d22facee8fa30c2e8971d12f426	patch
https://git.kernel.org/stable/c/86c9ee928c4a370e323e432aaf8dca79c4ba7c85	patch
https://git.kernel.org/stable/c/f5c772b76bbd95de8be51cf849c6098f6af6fcf9	patch
https://git.kernel.org/stable/c/dbb500bad02146b388041877574829016591ddc8	patch
https://git.kernel.org/stable/c/1f0bdc2884b67de337215079bba166df0cdf4ac5	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.