CVE-2026-74455
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.
CSIRTS triage
- What
- Missing validation of uCAN receive record lengths in PEAK USB driver allows buffer overrun.
- Who is affected
- Systems running affected Linux kernel versions with peak_usb CAN driver and PEAK USB devices connected.
- Urgency
- Moderate; unvalidated record lengths can cause denial of service or memory corruption.
- Action
- Apply kernel patch validating record lengths or update to patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Advisory coverage (3)
- unknownDSA-6466-1 linux - security updatedebian · 2026-08-25
- unknownCVE-2026-74455: In the Linux kernel, the following vulnerability has been resolved: can: peak_usb: validate uC…nvd · 2026-08-15
- mediumCVE-2026-74455: can: peak_usb: validate uCAN receive record lengthsmsrc · 2026-08-11
External references
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