CVE-2026-43019 Details
Description
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.
A use-after-free vulnerability has been addressed in the Bluetooth subsystem of the Linux kernel. This issue arose in the handling of connection parameters for isochronous groups, specifically within the 'set_cig_params_sync' function of the 'hci_conn' component. The vulnerability was caused by a lack of proper locking, which allowed the 'hci_conn' object to be concurrently modified or deleted while it was being accessed. To resolve this, the 'hci_dev_lock' has been introduced to ensure safe access to the connection object, preventing it from being freed or altered during critical operations.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/66d432e9b45bae7881ffcdb12cd8fd0bf254ef02 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7502c1cf303b69f71d085f5ff7251b0e1b0f09df | kernel.org | |
| https://git.kernel.org/stable/c/7d568fede8eac91161a60b710aa920abe9b0fb9f | kernel.org | Patch |
| https://git.kernel.org/stable/c/a2639a7f0f5bf7d73f337f8f077c19415c62ed2c | kernel.org | Patch |
| https://git.kernel.org/stable/c/bad65b4b0a96139f023eadc28a33125963208449 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6, < 6.12.81 >= 6.13, < 6.18.22 >= 6.19, < 6.19.12 6.4.16 6.5.3 7.0 rc1 7.0 rc2 7.0 rc3 7.0 rc4 7.0 rc5 7.0 rc6 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 19, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 8, 2026 | Initial Analysis | [email protected] |
| May 3, 2026 | CVE Modified | kernel.org |
| May 1, 2026 | New CVE Received | kernel.org |