Linux Kernel up to 6.6.122/6.12.68/6.18.8 gs_usb_receive_bulk_callback information exposure

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.122/6.12.68/6.18.8. This issue affects the function gs_usb_receive_bulk_callback. This manipulation causes information exposure. The identification of this vulnerability is CVE-2026-23155. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.6.122/6.12.68/6.18.8 and classified as problematic. Affected by this vulnerability is the function gs_usb_receive_bulk_callback. The manipulation with an unknown input leads to a information exposure vulnerability. The CWE definition for the vulnerability is CWE-209. The product generates an error message that includes sensitive information about its environment, users, or associated data. As an impact it is known to affect confidentiality. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): fix error message Sinc commit 79a6d1bfe114 ("can: gs_usb: gs_usb_receive_bulk_callback(): unanchor URL on usb_submit_urb() error") a failing resubmit URB will print an info message. In the case of a short read where netdev has not yet been assigned, initialize as NULL to avoid dereferencing an undefined value. Also report the error value of the failed resubmit.

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2026-23155 since 01/13/2026. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 299217 (Linux Distros Unpatched Vulnerability : CVE-2026-23155), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.123, 6.12.69 or 6.18.9 eliminates this vulnerability. Applying the patch aed58a28ea71a0d7d0947190fab1e3f4daa1d4a5/923379f1d7e3af8ccbf11edbbcf41f1bb3e9cfe6/8986cdf52f86208df9c7887fee23365b5d37da26/713ba826ae114ab339c9a1b31e209bebdadb0ac9/494fc029f662c331e06b7c2031deff3c64200eed 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 (299217). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.6.122
• 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
• 6.12.61
• 6.12.62
• 6.12.63
• 6.12.64
• 6.12.65
• 6.12.66
• 6.12.67
• 6.12.68
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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