CVE-2016-9777
First published: Fri Dec 02 2016(Updated: )
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.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=4.8<4.8.12 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 6.12.5-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12
- http://www.openwall.com/lists/oss-security/2016/12/02/2
- http://www.securityfocus.com/bid/94640
- https://bugzilla.redhat.com/show_bug.cgi?id=1400804
- https://github.com/torvalds/linux/commit/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
- https://launchpad.net/bugs/cve/CVE-2016-9777
- https://git.kernel.org/linus/81cdb259fb6d8c1c4ecfeea389ff5a73c07f5755
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1400805
- https://git.kernel.org/linus/af1bae5497b98cb99d6b0492e6981f060420a00c
- https://www.openwall.com/lists/oss-security/2016/12/02/2
- https://security-tracker.debian.org/tracker/CVE-2016-9777
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9777
- https://nvd.nist.gov/vuln/detail/CVE-2016-9777
- https://ubuntu.com/security/CVE-2016-9777
Frequently Asked Questions
What is the severity of CVE-2016-9777?
The severity of CVE-2016-9777 is high, with a severity value of 7.
How does CVE-2016-9777 impact Linux?
CVE-2016-9777 allows guest OS users to gain host OS privileges or cause a denial of service in Linux when I/O APIC is enabled.
Which versions of Linux are affected by CVE-2016-9777?
Linux versions before 4.8.12 are affected by CVE-2016-9777.
How can I fix CVE-2016-9777 on Ubuntu?
To fix CVE-2016-9777 on Ubuntu, update the linux package to version 4.8.0-37.39 or higher, or version 4.9~ or higher.
Where can I find more information about CVE-2016-9777?
You can find more information about CVE-2016-9777 at the following references: [link1], [link2], [link3].
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