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Fencer Vulns
medium 5.5

CVE-2016-9756 json

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 allow…

published 2016-12-28 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10557

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.8.15-1

debian advisories DEBIAN-CVE-2016-9756

  • linux Ubuntu 14.04 LTS 3.13.0-107.154
  • linux Ubuntu 16.04 LTS 4.4.0-59.80
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1003.12
  • linux-lts-vivid Ubuntu 14.04 LTS 3.19.0-79.87~14.04.1
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-59.80~14.04.1

ubuntu advisories UBUNTU-CVE-2016-9756

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-syms-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-rt_trace SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-source-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.96.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1

suse advisories SUSE-SU-2017:1102-1SUSE-SU-2017:0494-1SUSE-SU-2017:0471-1SUSE-SU-2017:0464-1SUSE-SU-2017:0437-1SUSE-SU-2017:0407-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-9756 updated cvss 4.1

Kernel: kvm: stack memory information leakage

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 arm-kernel Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.