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Issue 916958 link

Starred by 1 user
Status: WontFix
Owner:
zsm@chromium.org
Closed: Dec 20
Cc:
rkolchmeyer@google.com
wonderfly@google.com
groeck@chromium.org
chromeos-kernel-security-bug-access@google.com
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 2
Type: Bug-Security



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CVE-2018-19406 CrOS: Vulnerability reported in Linux kernel

Project Member Reported by vomit.go...@appspot.gserviceaccount.com, Dec 20 
VOMIT (go/vomit) has received an external vulnerability report for the Linux kernel. 

Advisory: CVE-2018-19406
  Details: http://vomit.googleplex.com/advisory?id=CVE/CVE-2018-19406
  CVSS severity score: 4.9/10.0
  Description:

kvm_pv_send_ipi in arch/x86/kvm/lapic.c in the Linux kernel through 4.19.2 allows local users to cause a denial of service (NULL pointer dereference and BUG) via crafted system calls that reach a situation where the apic map is uninitialized.



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

Comment 1 by zsm@chromium.org, Dec 20

Owner: zsm@chromium.org
Status: Assigned (was: Untriaged)

Comment 2 by zsm@chromium.org, Dec 20

Cc: groeck@chromium.org wonderfly@google.com
Labels: Security_Severity-Medium Security_Impact-None Pri-2
Status: WontFix (was: Assigned)
Upstream commit is
    38ab012f109c ("KVM: LAPIC: Fix pv ipis use-before-initialization")

The commit is present in chromeos-4.19.

v4.14 and older kernels do not have this commit. The bug was introduced by
    4180bf1b655a ("KVM: X86: Implement "send IPI" hypercall")

which is not present in v4.14 and earlier kernels. Marking as WontFix.

Comment 3 by wonderfly@google.com, Dec 20

Cc: rkolchmeyer@google.com
►

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