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Issue 738671 link

Starred by 1 user
Status: WontFix
Owner:
groeck@chromium.org
Closed: Jul 2017
Cc:
chromeos-kernel-security-bug-access@google.com
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 3
Type: Bug-Security



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CrOS: CVE-2017-9986: Vulnerability reported in Linux kernel

Project Member Reported by vomit.go...@appspot.gserviceaccount.com, Jul 1 2017 
VOMIT (go/vomit) has received an external vulnerability report for the Linux kernel. 

Advisory: CVE-2017-9986
  Details: http://vomit.googleplex.com/advisory?id=CVE/CVE-2017-9986
  CVSS severity score: 7.2/10.0
  Description:

The intr function in sound/oss/msnd_pinnacle.c in the Linux kernel through 4.11.7 allows local users to cause a denial of service (over-boundary access) or possibly have unspecified other impact by changing the value of a message queue head pointer between two kernel reads of that value, aka a "double fetch" vulnerability.



This bug was filed by http://go/vomit
Please contact us at vomit-team@google.com if you need any assistance.

Comment 1 by dominickn@chromium.org, Jul 3 2017

Components: OS>Kernel
Owner: groeck@chromium.org
Status: Assigned (was: Untriaged)

Comment 2 by groeck@chromium.org, Jul 3 2017

Labels: Pri-3
Status: WontFix (was: Assigned)
Summary: CrOS: CVE-2017-9986: Vulnerability reported in Linux kernel (was: CrOS: Vulnerability reported in Linux kernel)
See https://bugzilla.kernel.org/show_bug.cgi?id=196135.
Only seen if CONFIG_ISA is enabled, which is not the case with ChromeOS.
No fix available upstream. and there is disagreement if this is a security issue or an optimization. Since the problem does not affect us, it does not make sense to fix it ourselves (nor would we have the means to test a fix).
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