What’s Vulnerable › Vulnerabilities

CVE-2022-49139: Bluetooth: fix null ptr deref on hci_sync_conn_complete_evt

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: fix null ptr deref on hci_sync_conn_complete_evt This event is just specified for SCO and eSCO link types. On the reception of a HCI_Synchronous_Connection_Complete for a BDADDR of an existing LE connection, LE link type and a status that triggers the second case of the packet processing a NULL pointer dereference happens, as conn->link is NULL.

Affected products

• Linux kernel: before 5.4.231; from 5.5 before 5.10.167; from 5.11 before 5.15.92; from 5.16 before 5.17.3 — fixed in 5.10.167, 5.15.92, 5.17.3, 5.4.231

How to fix

Upgrade to a fixed version: Linux kernel 5.10.167, 5.15.92, 5.17.3, 5.4.231. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0f9db1209f59844839175b5b907d3778cafde93d
• https://git.kernel.org/stable/c/1c1291a84e94f6501644634c97544bb8291e9a1a
• https://git.kernel.org/stable/c/3afee2118132e93e5f6fa636dfde86201a860ab3
• https://git.kernel.org/stable/c/c1aa0dd52db4ce888be0bd820c3fa918d350ca0b
• https://git.kernel.org/stable/c/f61c23e73dc653b957781066abfa8105c3fa3f5b

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