Vulnerability Details : CVE-2016-8630
The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.
Vulnerability category: BypassGain privilegeDenial of service
Products affected by CVE-2016-8630
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-8630
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-8630
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2016-8630
-
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.Assigned by: nvd@nist.gov (Primary)
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-8630
-
https://bugzilla.redhat.com/show_bug.cgi?id=1393350
1393350 – (CVE-2016-8630) CVE-2016-8630 kernel: kvm: x86: NULL pointer dereference during instruction decodeIssue Tracking
-
https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937e
kvm: x86: Check memopp before dereference (CVE-2016-8630) · torvalds/linux@d9092f5 · GitHubIssue Tracking;Patch;Third Party Advisory
-
http://rhn.redhat.com/errata/RHSA-2017-0387.html
RHSA-2017:0387 - Security Advisory - Red Hat Customer Portal
-
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e
kernel/git/torvalds/linux.git - Linux kernel source treeIssue Tracking;Patch;Vendor Advisory
-
http://www.securityfocus.com/bid/94459
Linux Kernel 'kvm/emulate.c' Null Pointer Dereference Denial of Service Vulnerability
-
http://www.openwall.com/lists/oss-security/2016/11/22/3
oss-security - CVE-2016-8630 kernel: kvm: x86: NULL pointer dereference duringinstruction decodeMailing List;Third Party Advisory
-
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
Release Notes
-
http://rhn.redhat.com/errata/RHSA-2017-0386.html
RHSA-2017:0386 - Security Advisory - Red Hat Customer Portal
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