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CVE-2025-68343— can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header

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中未检查头部长度，可能导致越界读取。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.19% · P8

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux d08e973a77d128b25e01a08c34d89593fdf222da< 18cbce43363c9f84b90a92d57df341155eee0697 affected
d08e973a77d128b25e01a08c34d89593fdf222da< 3433680b759646efcacc64fe36aa2e51ae34b8f0 affected
d08e973a77d128b25e01a08c34d89593fdf222da< 616eee3e895b8ca0028163fcb1dce5e3e9dea322 affected
d08e973a77d128b25e01a08c34d89593fdf222da< f31693dc3a584c0ad3937e857b59dbc1a7ed2b87 affected
d08e973a77d128b25e01a08c34d89593fdf222da< 6fe9f3279f7d2518439a7962c5870c6e9ecbadcf affected
3.16 affected
< 3.16 unaffected
6.1.159≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-68343

Vulnerability Information
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Vulnerability Title
can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing header
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 header The driver expects to receive a struct gs_host_frame in gs_usb_receive_bulk_callback(). Use struct_group to describe the header of the struct gs_host_frame and check that we have at least received the header before accessing any members of it. To resubmit the URB, do not dereference the pointer chain "dev->parent->hf_size_rx" but use "parent->hf_size_rx" instead. Since "urb->context" contains "parent", it is always defined, while "dev" is not defined if the URB it too short.
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中未检查头部长度，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 ~ 18cbce43363c9f84b90a92d57df341155eee0697 -
Linux Linux 3.16 -

II. Public POCs for CVE-2025-68343

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III. Intelligence Information for CVE-2025-68343

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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-2025-68342 can: gs_usb: gs_usb_receive_bulk_callback(): check actual_length before accessing data
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-2025-68343

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