Security Advisory

CVE-2026-49430

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-19 05:15:29

Last updated 2026-08-19 05:15:29

Assigner freebsd

CVSS score not scored

State PUBLISHED

Description

The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode.

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