CVE-2016-8630

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-11-28 · updated 2026-06-17
Weakness: CWE-284

Description

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.

Affected products

Linux kernel: through 4.8.6

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7
http://www.openwall.com/lists/oss-security/2016/11/22/3
http://www.securityfocus.com/bid/94459
https://bugzilla.redhat.com/show_bug.cgi?id=1393350
https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937e
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e
http://rhn.redhat.com/errata/RHSA-2017-0386.html
http://rhn.redhat.com/errata/RHSA-2017-0387.html
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7

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