Linux Kernel up to 6.6.118/6.12.60/6.17.10 can gs_usb_receive_bulk_callback privilege escalation

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.118/6.12.60/6.17.10. This issue affects the function gs_usb_receive_bulk_callback of the component can. The manipulation leads to an unknown weakness. This vulnerability is uniquely identified as CVE-2025-68342. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.118/6.12.60/6.17.10 and classified as critical. This issue affects the function gs_usb_receive_bulk_callback of the component can. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data The URB received in gs_usb_receive_bulk_callback() contains a struct gs_host_frame. The length of the data after the header depends on the gs_host_frame hf::flags and the active device features (e.g. time stamping). Introduce a new function gs_usb_get_minimum_length() and check that we have at least received the required amount of data before accessing it. Only copy the data to that skb that has actually been received. [mkl: rename gs_usb_get_minimum_length() -> +gs_usb_get_minimum_rx_length()]

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-68342 since 12/16/2025. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/04/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279638 (Linux Distros Unpatched Vulnerability : CVE-2025-68342), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.119, 6.12.61 or 6.17.11 eliminates this vulnerability. Applying the patch 4ffac725154cf6a253f5e6aa0c8946232b6a0af5/ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b/fb0c7c77a7ae3a2c3404b7d0173b8739a754b513/395d988f93861101ec89d0dd9e3b876ae9392a5b 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 databases at Tenable (279638), EUVD (EUVD-2025-204804) and CERT Bund (WID-SEC-2025-2915). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Open Source Linux Kernel

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.118
• 6.12.0
• 6.12.1
• 6.12.2
• 6.12.3
• 6.12.4
• 6.12.5
• 6.12.6
• 6.12.7
• 6.12.8
• 6.12.9
• 6.12.10
• 6.12.11
• 6.12.12
• 6.12.13
• 6.12.14
• 6.12.15
• 6.12.16
• 6.12.17
• 6.12.18
• 6.12.19
• 6.12.20
• 6.12.21
• 6.12.22
• 6.12.23
• 6.12.24
• 6.12.25
• 6.12.26
• 6.12.27
• 6.12.28
• 6.12.29
• 6.12.30
• 6.12.31
• 6.12.32
• 6.12.33
• 6.12.34
• 6.12.35
• 6.12.36
• 6.12.37
• 6.12.38
• 6.12.39
• 6.12.40
• 6.12.41
• 6.12.42
• 6.12.43
• 6.12.44
• 6.12.45
• 6.12.46
• 6.12.47
• 6.12.48
• 6.12.49
• 6.12.50
• 6.12.51
• 6.12.52
• 6.12.53
• 6.12.54
• 6.12.55
• 6.12.56
• 6.12.57
• 6.12.58
• 6.12.59
• 6.12.60
• 6.17.0
• 6.17.1
• 6.17.2
• 6.17.3
• 6.17.4
• 6.17.5
• 6.17.6
• 6.17.7
• 6.17.8
• 6.17.9
• 6.17.10

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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