CVE-2021-47186 Information

Description

In the Linux kernel the following vulnerability has been resolved:

tipc: check for null after calling kmemdup

kmemdup can return a null pointer so need to check for it otherwise the null key will be dereferenced later in tipc_crypto_key_xmit as can be seen in the trace [1].

[1] https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

Reference

https://git.kernel.org/stable/c/a7d91625863d4ffed63b993b5e6dc1298b6430c9 https://git.kernel.org/stable/c/9404c4145542c23019a80ab1bb2ecf73cd057b10 https://git.kernel.org/stable/c/3e6db079751afd527bf3db32314ae938dc571916