Linux Kernel up to 5.16.10 iwlwifi device_release_driver use after free

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 5.16.10. Affected by this issue is the function device_release_driver of the component iwlwifi. Such manipulation leads to use after free. This vulnerability is referenced as CVE-2022-48787. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.16.10 and classified as critical. Affected by this issue is the function device_release_driver of the component iwlwifi. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: iwlwifi: fix use-after-free If no firmware was present at all (or, presumably, all of the firmware files failed to parse), we end up unbinding by calling device_release_driver(), which calls remove(), which then in iwlwifi calls iwl_drv_stop(), freeing the 'drv' struct. However the new code I added will still erroneously access it after it was freed. Set 'failure=false' in this case to avoid the access, all data was already freed anyway.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2022-48787 since 07/16/2024. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/16/2024).

Upgrading to version 4.14.268, 4.19.231, 5.4.181, 5.10.102, 5.15.25 or 5.16.11 eliminates this vulnerability. Applying the patch d3b98fe36f8a/7d6475179b85/494de920d98f/008508c16af0/ddd46059f7d9/9958b9cbb221/bea2662e7818 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.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 4.14.267
• 4.19.230
• 5.4.180
• 5.10.101
• 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
• 5.16.0
• 5.16.1
• 5.16.2
• 5.16.3
• 5.16.4
• 5.16.5
• 5.16.6
• 5.16.7
• 5.16.8
• 5.16.9
• 5.16.10

License

• open-source

Website

• Vendor: https://www.kernel.org/

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CPE 2.2info

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