Vulnerability Details : CVE-2016-9777
KVM in the Linux kernel before 4.8.12, when I/O APIC is enabled, does not properly restrict the VCPU index, which allows guest OS users to gain host OS privileges or cause a denial of service (out-of-bounds array access and host OS crash) via a crafted interrupt request, related to arch/x86/kvm/ioapic.c and arch/x86/kvm/ioapic.h.
Vulnerability category: Denial of service
Products affected by CVE-2016-9777
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-9777
0.07%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 19 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-9777
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.9
|
MEDIUM | AV:L/AC:M/Au:N/C:C/I:C/A:C |
3.4
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H |
1.1
|
6.0
|
NIST |
CWE ids for CVE-2016-9777
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-9777
-
https://bugzilla.redhat.com/show_bug.cgi?id=1400804
1400804 – (CVE-2016-9777) CVE-2016-9777 Kernel: kvm: out of bounds memory access via vcpu_idIssue Tracking
-
http://www.openwall.com/lists/oss-security/2016/12/02/2
oss-security - CVE request: Kernel: kvm: out of bounds memory access via vcpu_idMailing List;Patch
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
http://www.securityfocus.com/bid/94640
Linux Kernel 'lapic.c' Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
-
https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
KVM: x86: fix out-of-bounds accesses of rtc_eoi map · torvalds/linux@81cdb25 · GitHubPatch;Vendor Advisory
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12
Release Notes
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