Linux Kernel up to 5.4.230/5.10.166/5.15.91/5.17.2 hci_sync_conn_complete_evt null pointer dereference

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.4.230/5.10.166/5.15.91/5.17.2. This impacts the function hci_sync_conn_complete_evt. Executing a manipulation can lead to null pointer dereference. This vulnerability is registered as CVE-2022-49139. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.4.230/5.10.166/5.15.91/5.17.2. This vulnerability affects the function hci_sync_conn_complete_evt. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2022-49139 since 02/26/2025. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 237098 (SUSE SLES15 Security Update : kernel (SUSE-SU-2025:01620-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.231, 5.10.167, 5.15.92 or 5.17.3 eliminates this vulnerability. Applying the patch 1c1291a84e94f6501644634c97544bb8291e9a1a/0f9db1209f59844839175b5b907d3778cafde93d/c1aa0dd52db4ce888be0bd820c3fa918d350ca0b/f61c23e73dc653b957781066abfa8105c3fa3f5b/3afee2118132e93e5f6fa636dfde86201a860ab3 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (237098). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.4.230
• 5.10.166
• 5.15.0
• 5.15.1
• 5.15.2
• 5.15.3
• 5.15.4
• 5.15.5
• 5.15.6
• 5.15.7
• 5.15.8
• 5.15.9
• 5.15.10
• 5.15.11
• 5.15.12
• 5.15.13
• 5.15.14
• 5.15.15
• 5.15.16
• 5.15.17
• 5.15.18
• 5.15.19
• 5.15.20
• 5.15.21
• 5.15.22
• 5.15.23
• 5.15.24
• 5.15.25
• 5.15.26
• 5.15.27
• 5.15.28
• 5.15.29
• 5.15.30
• 5.15.31
• 5.15.32
• 5.15.33
• 5.15.34
• 5.15.35
• 5.15.36
• 5.15.37
• 5.15.38
• 5.15.39
• 5.15.40
• 5.15.41
• 5.15.42
• 5.15.43
• 5.15.44
• 5.15.45
• 5.15.46
• 5.15.47
• 5.15.48
• 5.15.49
• 5.15.50
• 5.15.51
• 5.15.52
• 5.15.53
• 5.15.54
• 5.15.55
• 5.15.56
• 5.15.57
• 5.15.58
• 5.15.59
• 5.15.60
• 5.15.61
• 5.15.62
• 5.15.63
• 5.15.64
• 5.15.65
• 5.15.66
• 5.15.67
• 5.15.68
• 5.15.69
• 5.15.70
• 5.15.71
• 5.15.72
• 5.15.73
• 5.15.74
• 5.15.75
• 5.15.76
• 5.15.77
• 5.15.78
• 5.15.79
• 5.15.80
• 5.15.81
• 5.15.82
• 5.15.83
• 5.15.84
• 5.15.85
• 5.15.86
• 5.15.87
• 5.15.88
• 5.15.89
• 5.15.90
• 5.15.91
• 5.17.0
• 5.17.1
• 5.17.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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