CVE-2016-8630

low-risk
Published 2016-11-28

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.

Do I need to act?

-
0.03% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (16)

Issue Tracking http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f...
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
Release Notes http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
Mailing List http://www.openwall.com/lists/oss-security/2016/11/22/3
http://www.securityfocus.com/bid/94459
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1393350
Issue Tracking https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937...
Issue Tracking http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f...
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
Release Notes http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
Mailing List http://www.openwall.com/lists/oss-security/2016/11/22/3
http://www.securityfocus.com/bid/94459
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1393350
Issue Tracking https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937...
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal