Versions Affected : All verisons prior to FreeNAS 11.3-U3.2

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Description

A race condition permitted a data structure in the kernel to be used after it was freed by the cryptodev module.

An unprivileged process can overwrite arbitrary kernel memory.

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Workaround

Unload the cryptodev kernel module if it is loaded:

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Mitigation

• Upgrade to FreeNAS 11.3-U3.2 or later.

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Commit

• FreeBSD Revision : r360976
• FreeNAS Commit : df67df4
• JIRA Ticket : NAS-105479

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Further information

• FreeBSD Errata Entry