Versions Affected : All verisons prior to FreeNAS 11.3-U5
IPv6 is a network layer supporting Hop-by-Hop options, which can be sent by applications via the socket API. The memory management for packet handling is done using mbufs.
Due to improper mbuf handling in the kernel, a use-after-free bug might be triggered by sending IPv6 Hop-by-Hop options over the loopback interface.
No workaround is available.
- Upgrade to FreeNAS 11.3-U5 or later.