CVE-2026-13351

published 2026-06-25

CVE-2026-13351: Zephyr's IPv6 network stack can be prevented from receiving or processing future incoming packets by sending a small number of maliciously fragmented IPv6…

Priority P3 43 high 7.5 CVSS 3.1

AV N AC L PR N UI N S U C N I N A H

Zephyr's IPv6 network stack can be prevented from receiving or processing future incoming packets by sending a small number of maliciously fragmented IPv6 packets. When such a packet is handled by the fragment-header processing path, the associated RX network packet buffer (allocated from a memory slab) is not released back to the pool. Repeating the malicious packet exhausts all RX buffer slots, after which the device can no longer obtain RX buffers and stops receiving traffic, resulting in a denial of service.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
zephyrproject-rtos	zephyr	* – 4.3	—

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