CVE-2016-4440
HIGH
7.8
CVSS Score
Published: June 27, 2016 at 10:00 AM UTC
Updated: June 17, 2026 at 12:47 AM UTC
1 product affected across 1 vendorLinux Kernel
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Severity
HIGH7.8
Exploit prediction
EPSS 0.4%
Description
arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which allows guest OS users to obtain direct APIC MSR access on the host OS, and consequently cause a denial of service (host OS crash) or possibly execute arbitrary code on the host OS, via x2APIC mode.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
4.5 ≤ v < 4.7
Affected range stops below 4.7, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66fMailing Listx_refsource_MLIST
Source: [email protected]
http://www.openwall.com/lists/oss-security/2016/05/20/2x_refsource_CONFIRMIssue Tracking
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1337806x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66fCVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-264
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