Kernel: kvm: stack memory information leakage
Published Dec 28, 2016
5.5
MEDIUMCVSS 3.0
EPSS 0.44%
Description
arch/x86/kvm/emulate.c in the Linux kernel before 4.8.12 does not properly initialize Code Segment (CS) in certain error cases, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.
Affected products
No data.
- ≤ 4.8.11
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
arm-kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | arm-kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | 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 versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2. This issue affects the version of Linux kernel as shipped with Red Hat Enterprise Linux 7. This has been rated as having Low security impact and is not 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.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
AV:L/AC:L/Au:N/C:P/I:N/A:N
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 | 0.44% (0.00443) | 36.20th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.44% (0.00443) | 35.07th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00018) | 2.60th | 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 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2117d5398c81554fbf803f5fd1dc55eb78216c0c x_refsource_CONFIRMPatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2017-01/msg00000.html vendor-advisoryx_refsource_SUSE
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12 x_refsource_CONFIRMRelease Notes
- http://www.openwall.com/lists/oss-security/2016/12/01/1 mailing-listx_refsource_MLISTMailing ListPatch
- http://www.securityfocus.com/bid/94615 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2016-9756 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1400468 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/2117d5398c81554fbf803f5fd1dc55eb78216c0c x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-9756
- https://www.cve.org/CVERecord?id=CVE-2016-9756
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=2117d5398c81554fbf803f5fd1dc55eb78216c0c | x_refsource_CONFIRMPatchVendor Advisory | |
| http://lists.opensuse.org/opensuse-security-announce/2017-01/msg00000.html | vendor-advisoryx_refsource_SUSE | |
| http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.12 | x_refsource_CONFIRMRelease Notes | |
| http://www.openwall.com/lists/oss-security/2016/12/01/1 | mailing-listx_refsource_MLISTMailing ListPatch | |
| http://www.securityfocus.com/bid/94615 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2016-9756 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1400468 | x_refsource_CONFIRMIssue Tracking | |
| https://github.com/torvalds/linux/commit/2117d5398c81554fbf803f5fd1dc55eb78216c0c | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-9756 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-9756 |
Change history (0)
No recorded changes yet.