CVE-2026-43019

Summary

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync

hci_conn lookup and field access must be covered by hdev lock in set_cig_params_sync, otherwise it's possible it is freed concurrently.

Take hdev lock to prevent hci_conn from being deleted or modified concurrently. Just RCU lock is not suitable here, as we also want to avoid "tearing" in the configuration.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa091289218202bc09d9b9caa8afcde1018584aec < 7502c1cf303b69f71d085f5ff7251b0e1b0f09dfaffected
LinuxLinuxa091289218202bc09d9b9caa8afcde1018584aec < 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02affected
LinuxLinuxa091289218202bc09d9b9caa8afcde1018584aec < 7d568fede8eac91161a60b710aa920abe9b0fb9faffected
LinuxLinuxa091289218202bc09d9b9caa8afcde1018584aec < bad65b4b0a96139f023eadc28a33125963208449affected
LinuxLinuxa091289218202bc09d9b9caa8afcde1018584aec < a2639a7f0f5bf7d73f337f8f077c19415c62ed2caffected
LinuxLinux3a273cd0f47dd672d37736e623849374f9ab9ce9affected
LinuxLinuxd8570c4c3f2a3e51b3c8b5e6ec898364c5c03062affected
LinuxLinux6.4.16 < 6.5affected
LinuxLinux6.5.3 < 6.6affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.81 <= 6.12.*unaffected
LinuxLinux6.18.22 <= 6.18.*unaffected
LinuxLinux6.19.12 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References