CVE-2026-43019
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 ↗
Additional information
- NVD record
- https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02Patch
- https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9fPatch
- https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2cPatch
- https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449Patch
- https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df