In the Linux kernel, the following vulnerability has been resolved:
cfg80211: fix race in netlink owner interface destruction
My previous fix here to fix the deadlock left a race where
the exact same deadlock (see the original commit referenced
below) can still happen if cfg80211_destroy_ifaces() already
runs while nl80211_netlink_notify() is still marking some
interfaces as nl_owner_dead.
The race happens because we have two loops here - first we
dev_close() all the netdevs, and then we destroy them. If we
also have two netdevs (first one need only be a wdev though)
then we can find one during the first iteration, close it,
and go to the second iteration – but then find two, and try
to destroy also the one we didn’t close yet.
Fix this by only iterating once.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 20.04 | noarch | linux-intel-iotg-5.15 | < any | UNKNOWN |
git.kernel.org/linus/f0a6fd1527067da537e9c48390237488719948ed (5.17-rc5)
git.kernel.org/stable/c/241e633cb379c4f332fc1baf2abec95ec840cbeb
git.kernel.org/stable/c/c979f792a2baf6d0f3419587668a1a6eba46a3d2
git.kernel.org/stable/c/f0a6fd1527067da537e9c48390237488719948ed
launchpad.net/bugs/cve/CVE-2022-48784
nvd.nist.gov/vuln/detail/CVE-2022-48784
security-tracker.debian.org/tracker/CVE-2022-48784
www.cve.org/CVERecord?id=CVE-2022-48784