What’s Vulnerable › Vulnerabilities

CVE-2026-74455: can: peak_usb: validate uCAN receive record lengths

• 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: peak_usb: validate uCAN receive record lengths pcan_usb_fd_decode_buf() walks uCAN records packed in one USB receive buffer. Require each record to contain the fixed header for its type, and verify CAN payload bytes before copying them into the skb.

Affected products

• Linux kernel: 4.0 — 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/2427ef427bdd78d862c7c76597bfd9eda88b81f1
• https://git.kernel.org/stable/c/276d989cd2dd88e2b7ab2c96fd10c86836b12781
• https://git.kernel.org/stable/c/2c8f08f3641a074da40acf05baa5a18ae2739260
• https://git.kernel.org/stable/c/6067c878e38d02a3d5c43497347e143f85c9064a
• https://git.kernel.org/stable/c/89c92a8052698dbbd3652a77c04d02bbd74a3275
• https://git.kernel.org/stable/c/93fcab2c6968446316bbb49548848df604d6346f
• https://git.kernel.org/stable/c/bf9d787b7e1ef59be19b35abca08194772deb97e
• https://git.kernel.org/stable/c/d9c115948c3dd5fcc2d0245cec5eb76c098503c8

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