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CVE-2026-43019 is a vulnerability in Microsoft software related to Bluetooth functionality, specifically in the hci_conn component's set_cig_params_sync function. The issue involves a potential use-after-free (UAF) condition. The affected version explicitly identified is version 3.0. No CVSS score or detailed impact information is provided. There is no indication of known exploits in the wild or available patches at this time.

This vulnerability concerns a potential use-after-free (UAF) flaw in the Bluetooth hci_conn component within the set_cig_params_sync function in Microsoft software. The vulnerability could allow improper memory handling, but specific exploitation details and impact are not provided. The only affected version explicitly stated is version 3.0. No patch or remediation information is currently available from the vendor advisory or other sources.

Detailed information about Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync affecting Microsoft Security Response Center Microsoft. Get real-time u

Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-43019 Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync - VEX

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Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync

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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.

CVE-2026-43019 is a high-severity use-after-free vulnerability in the Linux kernel Bluetooth subsystem's hci_conn component. The flaw arises because the set_cig_params_sync function did not properly acquire the hdev lock when performing hci_conn lookups and field accesses, allowing the hci_conn object to be freed concurrently. The existing RCU lock was insufficient to prevent this race condition. The fix involves taking the hdev lock to ensure hci_conn is not deleted or modified concurrently, preventing potential memory corruption. This vulnerability affects multiple linux-hwe-edge kernel versions prior to 6.8.0 and related builds. The issue has been addressed in official Ubuntu security advisories with patches available.

Detailed information about UBUNTU-CVE-2026-43019 affecting null linux-hwe-edge. Get real-time updates, technical details, and mitigation strategies.

UBUNTU-CVE-2026-43019 - Live Threat Intelligence - Threat Radar | OffSeq.com

Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync hci_conn lookup… (CVE-2026-43019)


Bluetooth: hci_conn: fix potential UAF in set_cig_params_syncCVE-2026-43019 0 CVE-2026-43019 is a vulnerability in Microsoft software related to Bluetooth functionality, specifically in the hci_conn component's set_cig_params_sync function. The issue involves a potential use-after-free (UAF) condition. The affected version explicitly identified is version 3.0. No CVSS score or detailed impact information is provided. There is no indication of known exploits in the wild or available patches at this time. MediumVulnerability#gcve #csaf #cve-2026-43019 Join the discussion	GCVE Database	05/02/2026, 00:00:00 UTC Added: 06/29/2026, 22:11:28 UTC
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync hci_conn lookup… (CVE-2026-43019)CVE-2026-43019 0 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. HighVulnerability#gcve #osv #ubuntu-cve-2026-43019 Join the discussion	GCVE Database	05/01/2026, 15:16:00 UTC Added: 07/17/2026, 10:27:19 UTC

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