In a research paper from 2015, we found that three quarters of home and small-office Internet #routers were running #firmware with obsolete #Linux kernels. Most of these were un-patched against many vulnerabilities — that is, they were susceptible to exploitation. [..] Just like any software, the #kernel is also susceptible to #bugs. A common “Long Term Support” kernel version is 2.6.32, which can be found in everything from Internet routers, IoT devices and maybe even in the entertainment system on certain BMWs. [..] A quick #vulnerability search on Linux kernel 2.6.32 currently shows 182 known vulnerabilities. Dozens of them are pretty serious"

https://www.computerworld.com.au/article/615338/working-dead-security-risk-dated-linux-kernels/