CVE-2022-49766 Information

Description

In the Linux kernel the following vulnerability has been resolved:

netlink: Bounds-check struct nlmsgerr creation

In preparation for FORTIFY_SOURCE doing bounds-check on memcpy() switch from __nlmsg_put to nlmsg_put() and explain the bounds check for dealing with the memcpy() across a composite flexible array struct. Avoids this future run-time warning:

memcpy: detected field-spanning write (size 32) of single field &errmsg->msg\ at net/netlink/af_netlink.c:2447 (size 16)

Reference

https://git.kernel.org/stable/c/710d21fdff9a98d621cd4e64167f3ef8af4e2fd1 https://git.kernel.org/stable/c/aff4eb16f589c3af322a2582044bca365381fcd6