CVE-2022-49190 Information

Description

In the Linux kernel the following vulnerability has been resolved:

kernel/resource: fix kfree() of bootmem memory again

Since commit ebff7d8f270d (\mem hotunplug: fix kfree() of bootmem memory) we could get a resource allocated during boot via alloc_resource(). And it’s required to release the resource using free_resource(). Howerver many people use kfree directly which will result in kernel BUG. In order to fix this without fixing every call site just leak a couple of bytes in such corner case.

Reference

https://git.kernel.org/stable/c/0cbcc92917c5de80f15c24d033566539ad696892 https://git.kernel.org/stable/c/a9e88c2618d228d7a4e7e515cf30dc0d0d813f27 https://git.kernel.org/stable/c/ab86020070999e758ce2e60c4348f20bf7ddba56 https://git.kernel.org/stable/c/d7faa04a44a0c37ac3d222fa8e0bdcbfcee9c0c8