In the Linux kernel, the following vulnerability has been resolved:

sysctl: always initialize i_uid/i_gid

Always initialize i_uid/i_gid inside the sysfs core so set_ownership()
can safely skip setting them.

Commit 5ec27ec735ba ("fs/proc/proc_sysctl.c: fix the default values of
i_uid/i_gid on /proc/sys inodes.") added defaults for i_uid/i_gid when
set_ownership() was not implemented. It also missed adjusting
net_ctl_set_ownership() to use the same default values in case the
computation of a better value failed.

kernel.org https://git.kernel.org/stable/c/1deae34db9f4f8e0e03f891be2e2e15c15c8ac05 [No types assigned]

kernel.org https://git.kernel.org/stable/c/98ca62ba9e2be5863c7d069f84f7166b45a5b2f4 [No types assigned]

kernel.org https://git.kernel.org/stable/c/c7e2f43d182f5dde473389dbb39f16c9f0d64536 [No types assigned]

kernel.org https://git.kernel.org/stable/c/ffde3af4b29bf97d62d82e1d45275587e10a991a [No types assigned]