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CVE-2025-68342— can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于gs_usb_receive_bulk_callback中未检查数据长度，可能导致越界读取。

AI Predicted 5.5 Difficulty: Hard EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux d08e973a77d128b25e01a08c34d89593fdf222da< 4ffac725154cf6a253f5e6aa0c8946232b6a0af5 affected
d08e973a77d128b25e01a08c34d89593fdf222da< ad55004a3cb5b41ef78aa6c09e7bc5a489ba652b affected
d08e973a77d128b25e01a08c34d89593fdf222da< fb0c7c77a7ae3a2c3404b7d0173b8739a754b513 affected
d08e973a77d128b25e01a08c34d89593fdf222da< 395d988f93861101ec89d0dd9e3b876ae9392a5b affected
3.16 affected
< 3.16 unaffected
6.6.119≤ 6.6.* unaffected
6.12.61≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-68342

Vulnerability Information
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Vulnerability Title
can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data
Source: CVE Program / CVE List V5
Vulnerability Description
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()]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于gs_usb_receive_bulk_callback中未检查数据长度，可能导致越界读取。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux d08e973a77d128b25e01a08c34d89593fdf222da ~ 4ffac725154cf6a253f5e6aa0c8946232b6a0af5 -
Linux Linux 3.16 -

II. Public POCs for CVE-2025-68342

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III. Intelligence Information for CVE-2025-68342

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Same Patch Batch · Linux · 2025-12-23 · 6 CVEs total

CVE-2025-68341 9.8 CRITICAL veth: reduce XDP no_direct return section to fix race
CVE-2025-68340 7.8 HIGH team: Move team device type change at the end of team_port_add
CVE-2025-68343 can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header
CVE-2025-68339 atm/fore200e: Fix possible data race in fore200e_open()
CVE-2025-68338 net: dsa: microchip: Don't free uninitialized ksz_irq

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68342

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