Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.12.1, < 5.15.25 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/241e633cb379c4f332fc1baf2abec95ec840cbebPatch
- https://git.kernel.org/stable/c/c979f792a2baf6d0f3419587668a1a6eba46a3d2Patch
- https://git.kernel.org/stable/c/f0a6fd1527067da537e9c48390237488719948edPatch
- https://git.kernel.org/stable/c/241e633cb379c4f332fc1baf2abec95ec840cbebPatch
- https://git.kernel.org/stable/c/c979f792a2baf6d0f3419587668a1a6eba46a3d2Patch
- https://git.kernel.org/stable/c/f0a6fd1527067da537e9c48390237488719948edPatch
FAQ
What is CVE-2022-48784?
CVE-2022-48784 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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 sam...
How severe is CVE-2022-48784?
CVE-2022-48784 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48784?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.