CVE-2022-48784
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)…
Does this matter?
Lower severity and a low EPSS score (0.17%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.17% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.