From: Willem de Bruijn <willemdebruijn.kernel@gmail•com>
To: Daniel Borkmann <daniel@iogearbox•net>,
Eric Dumazet <edumazet@google•com>,
"David S . Miller" <davem@davemloft•net>,
Jakub Kicinski <kuba@kernel•org>,
Paolo Abeni <pabeni@redhat•com>
Cc: Simon Horman <horms@kernel•org>,
Neal Cardwell <ncardwell@google•com>,
Kuniyuki Iwashima <kuniyu@google•com>,
netdev@vger•kernel.org, eric.dumazet@gmail•com,
Tamir Shahar <tamirthesis@gmail•com>,
Amit Klein <aksecurity@gmail•com>,
Willem de Bruijn <willemb@google•com>,
Alexei Starovoitov <ast@kernel•org>,
Andrii Nakryiko <andrii@kernel•org>,
Martin KaFai Lau <martin.lau@linux•dev>,
Eduard Zingerman <eddyz87@gmail•com>,
Kumar Kartikeya Dwivedi <memxor@gmail•com>,
Song Liu <song@kernel•org>,
Yonghong Song <yonghong.song@linux•dev>,
Jiri Olsa <jolsa@kernel•org>,
John Fastabend <john.fastabend@gmail•com>,
Stanislav Fomichev <sdf@fomichev•me>
Subject: Re: [PATCH net] tcp: restrict SO_ATTACH_FILTER to priv users
Date: Fri, 05 Jun 2026 12:58:02 -0400 [thread overview]
Message-ID: <willemdebruijn.kernel.21f5d98ff2ab3@gmail.com> (raw)
In-Reply-To: <f0c3f9e5-349c-4b1c-8a1d-9fbad7b935d1@iogearbox.net>
Daniel Borkmann wrote:
> On 6/5/26 1:21 PM, Eric Dumazet wrote:
> > This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets
> > to users with CAP_NET_ADMIN capability.
> >
> > This blocks potential side-channel attack where an unprivileged application
> > attaches a filter to leak TCP sequence/acknowledgment numbers.
> >
> > Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> > Signed-off-by: Eric Dumazet <edumazet@google•com>
> > Reported-by: Tamir Shahar <tamirthesis@gmail•com>
> > Reported-by: Amit Klein <aksecurity@gmail•com>
> > Cc: Willem de Bruijn <willemb@google•com>
> > Cc: Alexei Starovoitov <ast@kernel•org>
> > Cc: Daniel Borkmann <daniel@iogearbox•net>
> > Cc: Andrii Nakryiko <andrii@kernel•org>
> > Cc: Martin KaFai Lau <martin.lau@linux•dev>
> > Cc: Eduard Zingerman <eddyz87@gmail•com>
> > Cc: Kumar Kartikeya Dwivedi <memxor@gmail•com>
> > Cc: Song Liu <song@kernel•org>
> > Cc: Yonghong Song <yonghong.song@linux•dev>
> > Cc: Jiri Olsa <jolsa@kernel•org>
> > Cc: John Fastabend <john.fastabend@gmail•com>
> > Cc: Stanislav Fomichev <sdf@fomichev•me>
>
> Acked-by: Daniel Borkmann <daniel@iogearbox•net>
Reviewed-by: Willem de Bruijn <willemb@google•com>
prev parent reply other threads:[~2026-06-05 16:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-05 11:21 [PATCH net] tcp: restrict SO_ATTACH_FILTER to priv users Eric Dumazet
2026-06-05 14:18 ` Daniel Borkmann
2026-06-05 16:58 ` Willem de Bruijn [this message]
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