What’s Vulnerable › Vulnerabilities

CVE-2026-74457: can: peak_usb: add bounds check for USB channel index

• 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: add bounds check for USB channel index The channel control index ctrl_idx is derived from rx->len which comes directly from a device USB payload. The mask 0x0f allows values 0-15, but the array size of usb_if->dev[] is only 2. Values 2-15 cause heap out-of-bounds read, eventually causing kernel panic in the IRQ context. Add bounds checking for ctrl_idx before the array access in both pcan_usb_pro_handle_canmsg() and pcan_usb_pro_handle_error().

Affected products

• Linux kernel: 3.4 — 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/0149fdb50a30944827acf9600a2cc44de0325a7f
• https://git.kernel.org/stable/c/0c9268457bd6e4058fe55b4db01b16661c2eacf5
• https://git.kernel.org/stable/c/18b1a868a2cda66fb438007ba47ce5f2484db381
• https://git.kernel.org/stable/c/1acab790b7cecd4e144d1d18bdfe549e282f6b0b
• https://git.kernel.org/stable/c/39132f166ca8ce00ae60d8a9068e06a60943cc4b
• https://git.kernel.org/stable/c/825c903ca3c98cd0cf0e3de8ab8f2604a5339b3f
• https://git.kernel.org/stable/c/94fb6fe83ce152532b11b36730b30f3dc0c94217
• https://git.kernel.org/stable/c/f97b7e5e1cdaae15cd95b3a360028c7929664969

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