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Date: Mon, 10 May 2021 15:28:02 +0930
From: Alex Murray <>
Cc: Nadav Markus <>, Or Cohen
 <>, Salvatore Bonaccorso <>
Subject: Re: CVE-2021-23133: Linux kernel: race condition in
 sctp sockets

On Mon, 2021-05-10 at 13:54:43 +0930, Salvatore Bonaccorso wrote:

> Hi,
> On Sun, Apr 18, 2021 at 11:41:06AM +0300, Or Cohen wrote:
>> Hello,
>> This is an announcement about CVE-2021-23133 which is a race-condition
>> I found in Linux kernel sctp sockets (net/sctp/socket.c). It can lead to 
>> kernel
>> privilege escalation from the context of a network service or from
>> an unprivileged process if certain conditions are met.
>> The bug was fixed on April 13, 2021:
> It looks that additionally
> refer to CVE-2021-23133.

It seems b166a20b07382b8bc1dcee2a448715c9c2c81b5b got reverted in the
follow-up commit
and so 34e5b01186858b36c4d7c87e1a025071e8e2401f would appear to be the
most correct fix from what I can tell.

> Are both commits necessary?
> Regards,
> Salvatore

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