What’s Vulnerable › Vulnerabilities

CVE-2016-9083

• Severity: high (CVSS 7.8 v3.1)
• 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-119

Description

drivers/vfio/pci/vfio_pci.c in the Linux kernel through 4.8.11 allows local users to bypass integer overflow checks, and cause a denial of service (memory corruption) or have unspecified other impact, by leveraging access to a vfio PCI device file for a VFIO_DEVICE_SET_IRQS ioctl call, aka a "state machine confusion bug."

Affected products

• Linux kernel: from 3.6 before 3.10.107; from 3.11 before 3.12.70; from 3.13 before 3.16.39; from 3.17 before 3.18.51; from 3.19 before 4.1.41; from 4.2 before 4.4.65 — fixed in 3.10.107, 3.12.70, 3.16.39, 3.18.51, 4.1.41, 4.4.65

How to fix

Upgrade to a fixed version: Linux kernel 3.10.107, 3.12.70, 3.16.39, 3.18.51. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=05692d7005a364add85c6e25a6c4447ce08f913a
• http://rhn.redhat.com/errata/RHSA-2017-0386.html
• http://rhn.redhat.com/errata/RHSA-2017-0387.html
• http://www.openwall.com/lists/oss-security/2016/10/26/11
• http://www.securityfocus.com/bid/93929
• https://bugzilla.redhat.com/show_bug.cgi?id=1389258
• https://github.com/torvalds/linux/commit/05692d7005a364add85c6e25a6c4447ce08f913a
• https://patchwork.kernel.org/patch/9373631/
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=05692d7005a364add85c6e25a6c4447ce08f913a
• http://rhn.redhat.com/errata/RHSA-2017-0386.html
• http://rhn.redhat.com/errata/RHSA-2017-0387.html
• http://www.openwall.com/lists/oss-security/2016/10/26/11

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