CVE-2026-90027 usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop
A use-after-free vulnerability in the Linux kernel's Qualcomm PMIC Type-C driver allows attackers to cause denial of service or execute code via race conditions during port stop.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90027?
CVE-2026-90027 is a high-severity use after free vulnerability in Linux, published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
usb: typec: qcom-pmic-typec: disable cc_debounce_dwork on stop
cc_debounce_dwork is queued from the set_cc() and start_toggling() callbacks, which run from TCPM's kthread worker. port_stop() returns before tcpm_unregister_port() destroys that worker. Flushing the worker during unregister may therefore run a callback which queues the delayed work after port_stop() has returned.
The delayed work can then run after devres has freed pmic_typec_port.
Use disable_delayed_work_sync() in port_stop() to cancel a pending instance and prevent the TCPM callbacks from queueing another one.
This issue was found by an in-house static analysis tool.
Which versions are affected by CVE-2026-90027?
How do I fix CVE-2026-90027?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-90027 being exploited?
There is no known exploitation of CVE-2026-90027 in the wild and no public exploit code.
Sources
Also known as AZL-101666, BELL-CVE-2026-90027, DEBIAN-CVE-2026-90027, GHSA-fm22-hcrq-m39w, UBUNTU-CVE-2026-90027.