Quick answers
- Is CVE-2026-75084 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-75084 being exploited in the wild.
- How severe is CVE-2026-75084?
- Medium severity, with a CVSS score of 6.8, published 14 October 2026.
- Which products and versions are affected?
- Zephyr Project Zephyr OS versions with CONFIG_IEEE802154_CC1200 enabled.
- Is there a fix for CVE-2026-75084?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-75084 attacked?
- It is attacked over the network or from the adjacent network, in an operating system.
- Am I affected by CVE-2026-75084?
- Check whether you run Zephyr Project Zephyr OS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The driver reads the PHY packet length from the first byte of the RX FIFO (0–255) but validates only a lower bound (< 3 bytes), failing to clamp values above the IEEE 802.15.4 maximum of 127. A single SPI burst read of the unclamped length writes past the end of a 128-byte network buffer fragment, leaving the buffer's length metadata inconsistent with its capacity. The overflow is triggered remotely without authentication or user interaction and depends only on RF timing; overflowed data is FIFO underflow output, resulting in network buffer pool corruption and DoS rather than controlled arbitrary write.
Affected products
- Zephyr Project Zephyr OS versions with CONFIG_IEEE802154_CC1200 enabled
Timeline
- 2026-10-14: disclosed