Re: Please apply dd83c161fbcc ("kernel/exit.c: avoid undefined behaviour when calling wait4()") to v4.9.y and older

On Fri, May 18, 2018 at 04:52:07PM +0200, Greg Kroah-Hartman wrote:

On Fri, May 18, 2018 at 06:47:46AM -0700, Guenter Roeck wrote:

...

Hi Greg,

please apply commit dd83c161fbc ("kernel/exit.c: avoid undefined behaviour when calling wait4()") to v4.9.y and older to fix CVE-2018-10087.

Odd no one asked for that one to be backported before :(

Not entirely surprising. The patch is from July 2017, it wasn't marked for stable, and the CVE has been created only recently (04/13/2018). CVE severity and the reference to the upstream commit were added yesterday, which caused our CVE tracker to barf at me.

Guenter