CVE-2022-49258 Information

Description

In the Linux kernel the following vulnerability has been resolved:

crypto: ccree - Fix use after free in cc_cipher_exit()

kfree_sensitive(ctx_p->user.key) will free the ctx_p->user.key. But ctx_p->user.key is still used in the next line which will lead to a use after free.

We can call kfree_sensitive() after dev_dbg() to avoid the uaf.

Reference

https://git.kernel.org/stable/c/25c358efee5153dfd240d4e0d3169d5bebe9cacd https://git.kernel.org/stable/c/335bf1fc74f775a8255257aa3e33763f2257b676 https://git.kernel.org/stable/c/3d950c34074ed74d2713c3856ba01264523289e6 https://git.kernel.org/stable/c/c93017c8d5ebf55a4e453ac7c84cc84cf92ab570 https://git.kernel.org/stable/c/cffb5382bd8d3cf21b874ab5b84bf7618932286b