CVE-2024-27410wifi: nl80211: reject iftype change with mesh ID change

Official description

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: reject iftype change with mesh ID change It's currently possible to change the mesh ID when the interface isn't yet in mesh mode, at the same time as changing it into mesh mode. This leads to an overwrite of data in the wdev->u union for the interface type it currently has, causing cfg80211_change_iface() to do wrong things when switching. We could probably allow setting an interface to mesh while setting the mesh ID at the same time by doing a different order of operations here, but realistically there's no userspace that's going to do this, so just disallow changes in iftype when setting mesh ID.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/930e826962d9f01dcd2220176134427358d112f2
• https://git.kernel.org/stable/c/177d574be4b58f832354ab1ef5a297aa0c9aa2df
• https://git.kernel.org/stable/c/a2add961a5ed25cfd6a74f9ffb9e7ab6d6ded838
• https://git.kernel.org/stable/c/f78c1375339a291cba492a70eaf12ec501d28a8e
• https://git.kernel.org/stable/c/d38d31bbbb9dc0d4d71a45431eafba03d0bc150d x_transferred
• https://git.kernel.org/stable/c/0cfbb26ee5e7b3d6483a73883f9f6157bca22ec9 x_transferred
• https://git.kernel.org/stable/c/99eb2159680af8786104dac80528acd5acd45980 x_transferred
• https://git.kernel.org/stable/c/063715c33b4c37587aeca2c83cf08ead0c542995 x_transferred
• https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html x_transferred
• https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html x_transferred