Threat Alert: Linux Kernel Bug Knocks PCs, IoT Gadgets and More Offline

Four vulnerabilities could “SACK” connected devices with denial-of-service exploits.

According to Netflix researchers, a multiple TCP-based remote denial-of-service vulnerabilities have been uncovered in the FreeBSD and Linux kernels.

For instance, exploitation would interrupt TCP connections and therefore streaming content flows to vulnerable Linux-based PCs (putting a crimp in binge-watching).

Also, attackers could disable connections to vulnerable Linux-powered internet of things gadgets, taking them offline.

Netflix researchers noted that, three flaws related to denial-of-service (DoS) were found in the Linux kernel’s handling of TCP networking. The first two are related to TCP Selective Acknowledgement (SACK) packets combined with the Maximum Segment Size parameter, and the third solely with the Maximum Segment Size parameter.

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