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CVE-2016-9777

23
FAUCET Score

CVE-2016-9777 is a high-severity vulnerability affecting KVM in the Linux kernel prior to version 4.8.12, specifically when I/O APIC is enabled. It allows a guest OS user to achieve host OS privileges or cause a denial of service through an out-of-bounds array access and host crash. The attack requires low privileges on the guest OS and has high impact on confidentiality, integrity, and availability, but high attack complexity. Currently, there is no known active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.8, < 4.8.12CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.1
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 70th percentile among its peer group of 1,523 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.4 InfoSec Media, 0.1 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-9777Important

Kernel: kvm: out of bounds memory access via vcpu_id

Nov 23, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
github.com / torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
PatchVendor Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.8.12
Release Notes
openwall.com / lists/oss-security/2016/12/02/2
Mailing ListPatch
securityfocus.com / bid/94640
Third Party AdvisoryVDB Entry