kernel: State machine confusion bug in vfio driver leading to memory corruption
Published Nov 28, 2016
7.8
HIGHCVSS 3.1
EPSS 0.38%
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
No data.
- ≥ 3.6 · < 3.10.107
- ≥ 3.11 · < 3.12.70
- ≥ 3.13 · < 3.16.39
- ≥ 3.17 · < 3.18.51
- ≥ 3.19 · < 4.1.41
- ≥ 4.2 · < 4.4.65
- ≥ 4.5 · < 4.9
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.10.2.el7
Fixed · RHSA-2017:0386
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.10.2.rt56.435.el7
Fixed · RHSA-2017:0387
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-514.10.2.el7 | Fixed | RHSA-2017:0386 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.10.2.rt56.435.el7 | Fixed | RHSA-2017:0387 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2. This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7. This has been rated as having Moderate security impact and is currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.38% (0.00383) | 29.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.38% (0.00383) | 29.90th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00047) | 11.87th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.10% (0.01104) | 52.45th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.10% (0.01104) | 50.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.10% (0.01104) | 28.85th | v2 (v2022.01.01) |
References (11)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=05692d7005a364add85c6e25a6c4447ce08f913a x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0386.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0387.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/26/11 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93929 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-9083 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1389258 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/05692d7005a364add85c6e25a6c4447ce08f913a x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-9083
- https://patchwork.kernel.org/patch/9373631/ x_refsource_CONFIRMPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-9083
Change history (0)
No recorded changes yet.