This security advisory is a reaction on the recently discovered network vulnerabilities in Linux kernel (see below on particular names and links).
These vulnerabilities can, under certain circumstances, be used by an attacker against a range of our routers running current firmware (6.1.9) with the potential result of the router rebooting.
We have already prepared a patch which closes the vulnerabilities. The patch will be included in future firmware versions (6.1.10, 6.2.0) when these are released.
Until the new firmware versions are available, you may apply any of the recommended workaround. The easiest workaround (and also the recommended one) is to disable SACK ...