CVE-2024-36931 Information

Description

In the Linux kernel the following vulnerability has been resolved:

s390/cio: Ensure the copied buf is NUL terminated

Currently we allocate a lbuf-sized kernel buffer and copy lbuf from userspace to that buffer. Later we use scanf on this buffer but we don’t ensure that the string is terminated inside the buffer this can lead to OOB read when using scanf. Fix this issue by using memdup_user_nul instead.

Reference

https://git.kernel.org/stable/c/c9d48ce163305595ae20aee27774192476d5e6a5 https://git.kernel.org/stable/c/10452edd175fcc4fd0f5ac782ed2a002e3e5d65c https://git.kernel.org/stable/c/84b38f48836662c4bfae646c014f4e981e16a2b2 https://git.kernel.org/stable/c/06759ebaf75c19c87b2453a5e130e9e61e9b5d65 https://git.kernel.org/stable/c/da7c622cddd4fe36be69ca61e8c42e43cde94784