Date: Fri, 22 Apr 2022 10:28:20 +0200 From: Greg KH <greg@...ah.com> To: oss-security@...ts.openwall.com Subject: Re: CVE-2022-1419: Linux kernel: A concurrency use-after-free in vgem_gem_dumb_create On Fri, Apr 22, 2022 at 09:05:50AM +0200, Marcus Meissner wrote: > On Thu, Apr 21, 2022 at 07:35:46PM +0200, Greg KH wrote: > > On Thu, Apr 21, 2022 at 11:44:54PM +0800, Minh Yuan wrote: > > > Timeline: > > > * 21.04.22 - Vulnerability reported to security@...nel.org and > > > linux-distros@...openwall.org > > > * 21.04.22 - CVE-2022-1419 assigned. > > > > Why are people assigning CVEs to things that require root permissions? > > Or are there distros running on kernels older than 5.4 that allow > > untrusted users access to the drm ioctls directly? > > > > I'm curious as it would affect the backporting of the needed fixes here > > (or not.) > > It does not, distros like SUSE give out ACLs or groups write perms to /dev/dri/card0 > to it via udev. > > crw-rw----+ 1 root video 226, 0 Apr 22 08:47 /dev/dri/card0 > > getfacl /dev/dri/card0 > > # file: dev/dri/card0 > # owner: root > # group: video > user::rw- > user:marcus:rw- > group::rw- > mask::rw- > other::--- Ok, so this is an issue for older kernels, I'll try to bump it up my priority list for backports, but I would really like some help from those distros still relying on those older kernels for this work. Especially for testing. thanks, greg k-h
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