Re: [PATCH net v3] ppp: require CAP_NET_ADMIN in target netns for unattached ioctls

[email protected] Sun, 12 Apr 2026 20:50:11 +0000

Newsgroups	org.kernel.vger.linux-ppp,org.kernel.vger.linux-kernel,org.kernel.vger.netdev
Message-ID	<177602701104.3405581.2910022095376672585.git-patchwork-notify@kernel.org>

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <[email protected]>:

On Thu,  9 Apr 2026 16:11:15 +0900 you wrote:
> /dev/ppp open is currently authorized against file->f_cred->user_ns,
> while unattached administrative ioctls operate on current->nsproxy->net_ns.
> 
> As a result, a local unprivileged user can create a new user namespace
> with CLONE_NEWUSER, gain CAP_NET_ADMIN only in that new user namespace,
> and still issue PPPIOCNEWUNIT, PPPIOCATTACH, or PPPIOCATTCHAN against
> an inherited network namespace.
> 
> [...]

Here is the summary with links:
  - [net,v3] ppp: require CAP_NET_ADMIN in target netns for unattached ioctls
    https://git.kernel.org/netdev/net/c/2bb6379416fd

You are awesome, thank you!
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