What’s Vulnerable › Vulnerabilities

CVE-2026-74458: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-19

Description

In the Linux kernel, the following vulnerability has been resolved: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents The wait and bulk receive paths walk variable-length commands from a USB buffer. A nonzero command shorter than CMD_HEADER_LEN can still be dispatched, and the wait path copies a matching command into a fixed caller-owned struct kvaser_cmd using the device-provided length. Reject nonzero commands that do not contain the fixed header or that extend beyond the current USB buffer item. In the wait path, also reject a matching command that exceeds the destination before copying it.

Affected products

• Linux kernel: 3.8 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0293dd153f9dbc1ddf5dacdccc76b363bce4a8ee
• https://git.kernel.org/stable/c/185cb1fa38142a3cbf223dd8b3abb24217f330d3
• https://git.kernel.org/stable/c/21f0465fd86d77794aaed8e05f833634f68d178d
• https://git.kernel.org/stable/c/3d0897ec623e422695d70d80ae456f89476c5328
• https://git.kernel.org/stable/c/695aea154bb2d453e6daada1510972fafd075285
• https://git.kernel.org/stable/c/72f96c2942f11a0ae8663adcb3d9ee986e07d4fa
• https://git.kernel.org/stable/c/c00ec53d7dec08134e97071850cc00ef000c5b77
• https://git.kernel.org/stable/c/d9e91672526ffa279709b15490118aea1bdee714

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