Follow @Openwall on Twitter for new release announcements and other news
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date: Wed, 10 Apr 2024 21:56:33 +0200
From: "Dr. Christopher Kunz" <>
Subject: New Linux LPE via GSMIOC_SETCONF_DLCI?

Hello all,

it seems that a new LPE (or two) in the Linux kernel has been dropped. The situation is a bit confusing and after discussing with Alexander off-list, I decided to post the various versions of the bug and the corresponding PoCs.

Maybe we can clear this up together.

1. YuriiCrimson's version (April 6-ish)

It seems to use GSMIOC_SETCONF_DLCI, PoC supposedly works on current Ubuntu and Debians, but is stopped by LKRG.

PoC and writeup are here:

2. jmpeaux' version (March 21)

This seems similar, also using GSMIOC_SETCONF_DLCI. In the screen shots, even the working dir for the PoC is identical to 1). Yurii claims jmpeaux stole his work.



And then there's

3. ZDI-24-020 / CVE-2023-6546 (January)

This also exploits a race condition resulting UAF in the gsm_dlci struct. It's a little older.

Writeup and PoC:

What do you make of this?

Best regards,


Powered by blists - more mailing lists

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.