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CVE-2016-9777

HIGH
7.8
CVSS Score
Published: December 28, 2016 at 07:42 AM UTC
Updated: June 17, 2026 at 12:56 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%

Description

KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-bounds array access and host OS crash) via a crafted interrupt request, related to arch/x86/kvm/ioapic.c and arch/x86/kvm/ioapic.h.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.8 ≤ v < 4.8.12
Affected range stops below 4.8.12, so it looks safe — our inference, not a vendor statement

References (6)

x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
x_refsource_CONFIRMRelease Notes
Source: [email protected]
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12
Mailing Listx_refsource_MLISTPatch
Source: [email protected]
http://www.openwall.com/lists/oss-security/2016/12/02/2
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/94640
x_refsource_CONFIRMIssue Tracking
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1400804
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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