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Date: Wed, 17 Mar 2021 16:17:05 +0100
From: Greg KH <>
Subject: Re: CVE-2021-20219 Linux kernel: improper
 synchronization in flush_to_ldisc() can lead to DoS

On Wed, Mar 17, 2021 at 07:45:59PM +0530, Rohit Keshri wrote:
> Hello Team,
> A denial of service vulnerability was found in n_tty_receive_char_special
> in drivers/tty/n_tty.c of the Linux kernel.  In this flaw a local attacker
> with a normal user privilege could delay the loop (due to a changing
> ldata->read_head, and a missing sanity check) and cause a threat to the
> system availability.
> 'CVE-2021-20219' was assigned by Red Hat.
> Acknowledgements: Evgenii Shatokhin (Virtuozzo Research LLC)

Really?  Not the tools or people that reported this issue and fixed it
in the community back in 2018?


greg k-h

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