CVE-2026-74458: can: kvaser_usb_leaf: kvaser_usb_leaf_wait_cmd(): validate received command extents
CSIRTS triage
- What
- Insufficient validation of received command extents in kvaser_usb_leaf driver allows buffer overflow.
- Who is affected
- Systems running affected Linux kernel versions with kvaser_usb_leaf CAN driver and Kvaser USB devices connected.
- Urgency
- Moderate; unvalidated command extents can cause denial of service or memory corruption.
- Action
- Apply kernel patch validating command extents or update to patched kernel version.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-74458
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-744580.18% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-74458 | coverage & exploitation status | NVD · CVE.org |
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