CVE-2026-43019
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec < 7502c1cf303b69f71d085f5ff7251b0e1b0f09df | affected |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec < 66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 | affected |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec < 7d568fede8eac91161a60b710aa920abe9b0fb9f | affected |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec < bad65b4b0a96139f023eadc28a33125963208449 | affected |
| Linux | Linux | a091289218202bc09d9b9caa8afcde1018584aec < a2639a7f0f5bf7d73f337f8f077c19415c62ed2c | affected |
| Linux | Linux | 3a273cd0f47dd672d37736e623849374f9ab9ce9 | affected |
| Linux | Linux | d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062 | affected |
| Linux | Linux | 6.4.16 < 6.5 | affected |
| Linux | Linux | 6.5.3 < 6.6 | affected |
| Linux | Linux | 6.6 | affected |
| Linux | Linux | 0 < 6.6 | unaffected |
| Linux | Linux | 6.6.143 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.81 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.22 <= 6.18.* | unaffected |
| Linux | Linux | 6.19.12 <= 6.19.* | unaffected |
| Linux | Linux | 7.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df
- https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02
- https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f
- https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449
- https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c
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