Linux Kernel up to 5.10.95/5.15.18/5.16.4 dpu_setup_dspp_pcc ctx null pointer dereference

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.10.95/5.15.18/5.16.4. It has been rated as critical. This affects the function dpu_setup_dspp_pcc. This manipulation of the argument ctx causes null pointer dereference. This vulnerability is tracked as CVE-2022-48749. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.10.95/5.15.18/5.16.4. Affected by this vulnerability is the function dpu_setup_dspp_pcc. The manipulation of the argument ctx 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: drm/msm/dpu: invalid parameter check in dpu_setup_dspp_pcc The function performs a check on the "ctx" input parameter, however, it is used before the check. Initialize the "base" variable after the sanity check to avoid a possible NULL pointer dereference. Addresses-Coverity-ID: 1493866 ("Null pointer dereference")

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2022-48749. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 247057 (Linux Distros Unpatched Vulnerability : CVE-2022-48749), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.96, 5.15.19 or 5.16.5 eliminates this vulnerability. Applying the patch 93a6e920d8cc/8f069f6dde51/1ebc18836d5d/170b22234d54 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 (247057). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5
• 5.10.6
• 5.10.7
• 5.10.8
• 5.10.9
• 5.10.10
• 5.10.11
• 5.10.12
• 5.10.13
• 5.10.14
• 5.10.15
• 5.10.16
• 5.10.17
• 5.10.18
• 5.10.19
• 5.10.20
• 5.10.21
• 5.10.22
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• 5.10.24
• 5.10.25
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• 5.10.33
• 5.10.34
• 5.10.35
• 5.10.36
• 5.10.37
• 5.10.38
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• 5.10.41
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• 5.10.49
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• 5.10.57
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• 5.10.76
• 5.10.77
• 5.10.78
• 5.10.79
• 5.10.80
• 5.10.81
• 5.10.82
• 5.10.83
• 5.10.84
• 5.10.85
• 5.10.86
• 5.10.87
• 5.10.88
• 5.10.89
• 5.10.90
• 5.10.91
• 5.10.92
• 5.10.93
• 5.10.94
• 5.10.95
• 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
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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Entryinfo

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