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Date: Thu, 23 Feb 2017 10:40:54 +0100
From: Hanno Böck <>
Subject: Re: util-linux 2.29.2 fixes CVE-2017-2616


On Thu, 23 Feb 2017 08:46:30 +0100
Marcus Meissner <> wrote:

> util-linux 2.29.2 fixes CVE-2017-2616, a race condition which allowed
> local users to kill other processes.

I just reported this in Gentoo [1], yet I was informed that we're not
using su from util-linux, but from shadow. So depending on the
distribution you may not use this implementation of su.

I haven't digged deeper into this, can you say if this issue is
generic enough to be expected in other implementations as well? (Not
sure if the implementations of su in shadow and util-linux share a
common codebase, seems to be quite old stuff.)

Hanno Böck

GPG: FE73757FA60E4E21B937579FA5880072BBB51E42

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