From: Florian Westphal <fw@strlen.de>
To: "Julius Rüberg" <julius.rueberg@student.kit.edu>
Cc: Richard Van Tassel <richard.van.tassel.work@gmail.com>,
netfilter@vger.kernel.org
Subject: Re: userns packet mangling
Date: Thu, 22 Oct 2026 15:57:07 +0200 [thread overview]
Message-ID: <atoWM6U90DGiy8Pu@strlen.de> (raw)
In-Reply-To: <8b03ef541269cff566c220ebc1ea34c77b303dad.camel@student.kit.edu>
Julius Rüberg <julius.rueberg@student.kit.edu> wrote:
> > Florian Westphal <fw@strlen.de>
> > wrote:https://patchwork.ozlabs.org/project/netfilter-devel/patch/20260905050150.30273-1-fw@strlen.de/
> >
> > is still pending, and its closing known security hole.
> > So no, for now we can't re-enable this feature.
>
> Just out of curiosity, if disabling packet mangling for userns closes a
> security hole, wouldn't this leave LTS kernels, which to my
> understanding have neither your fix nor the disablement backported,
> vulnerable?
Sure, but there is no local security with unpriv userns anyway.
I'd say at the moment there is no local security at all,
even in latest kernels.
prev parent reply other threads:[~2026-10-22 13:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-16 20:18 userns packet mangling Richard Van Tassel
2026-10-16 22:51 ` Florian Westphal
2026-10-17 9:04 ` Pablo Neira Ayuso
2026-10-22 13:15 ` Julius Rüberg
2026-10-22 13:57 ` Florian Westphal [this message]
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