CVE-2015-8844
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check...
5.5 MediumFix available
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
0.39%Down 0.8 points since Feb 4, 2022
What each source reports
NVD Score used
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
CVE-2015-8844- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.7 Medium
AV:L/AC:M/Au:N/C:N/I:N/A:C - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
CVE-2015-8844- Updated
- 2026-11-02
EUVDEUVD-2015-8710 No score
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
EUVD-2015-8710- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qhfv-w8w8-3r26
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check...
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
GHSA-qhfv-w8w8-3r26- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
CVE-2015-8844- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2015-8844
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
DEBIAN-CVE-2015-8844- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVRHSA-2016:2574
Red Hat Security Advisory: kernel security, bug fix, and enhancement update
- Record
RHSA-2016:2574- CVSS 3.0
- 8.4 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVRHSA-2016:2584
Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update
- Record
RHSA-2016:2584- CVSS 3.0
- 8.4 High
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2015-8844
The signal implementation in the Linux kernel before 4.3.5 on powerpc platforms does not check for an MSR with both the S and T bits set, which allows local users to cause a denial of service (TM Bad Thing exception and panic) via a crafted application.
- Record
UBUNTU-CVE-2015-8844- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
linuxDebian:12 |
before 4.4.2-1 | 4.4.2-1 |
linuxDebian:13 |
before 4.4.2-1 | 4.4.2-1 |
linuxDebian:14 |
before 4.4.2-1 | 4.4.2-1 |
kernel-debug-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libs-develRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perf-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perf-debuginfoRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
Show 93 moreShow less
| Package | Affected | Fixed |
|---|---|---|
kernelRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-abi-whitelistsRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debugRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-develRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-develRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-docRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-headersRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-toolsRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libsRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perfRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perfRed Hat:enterprise_linux:7::client |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-debuginfoRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfoRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-debuginfoRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libs-develRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perf-debuginfoRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perf-debuginfoRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernelRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-abi-whitelistsRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debugRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-develRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-develRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-docRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-headersRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-toolsRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libsRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perfRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perfRed Hat:enterprise_linux:7::computenode |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-develRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-ppc64Red Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-ppc64leRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libs-develRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perf-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perf-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernelRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-abi-whitelistsRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-bootwrapperRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debugRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-s390xRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-develRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-docRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-headersRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-kdumpRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-kdump-debuginfoRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-kdump-develRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-toolsRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libsRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perfRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perfRed Hat:enterprise_linux:7::server |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debuginfo-common-x86_64Red Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libs-develRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perf-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perf-debuginfoRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernelRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-abi-whitelistsRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debugRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-debug-develRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-develRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-docRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-headersRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-toolsRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-tools-libsRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
perfRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
python-perfRed Hat:enterprise_linux:7::workstation |
before 0:3.10.0-514.el7 | 0:3.10.0-514.el7 |
kernel-rtRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debugRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debug-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debug-develRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debug-kvmRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debug-kvm-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-debuginfo-common-x86_64Red Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-develRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-docRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-kvmRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-kvm-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-traceRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-trace-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-trace-develRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-trace-kvmRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
kernel-rt-trace-kvm-debuginfoRed Hat:rhel_extras_rt:7 |
before 0:3.10.0-514.rt56.420.el7 | 0:3.10.0-514.rt56.420.el7 |
linuxUbuntu:14.04:LTS |
before 3.13.0-77.121, plus listed versions 3.11.0-12.193.12.0-1.33.12.0-2.53.12.0-2.73.12.0-3.8 Show 45 moreShow less3.12.0-3.93.12.0-4.103.12.0-4.123.12.0-5.133.12.0-7.153.13.0-1.163.13.0-2.173.13.0-3.183.13.0-4.193.13.0-5.203.13.0-6.233.13.0-7.253.13.0-7.263.13.0-8.273.13.0-8.283.13.0-10.303.13.0-11.313.13.0-12.323.13.0-13.333.13.0-14.343.13.0-15.353.13.0-16.363.13.0-17.373.13.0-18.383.13.0-19.393.13.0-19.403.13.0-20.423.13.0-21.433.13.0-22.443.13.0-23.453.13.0-24.463.13.0-24.473.13.0-27.503.13.0-29.533.13.0-30.543.13.0-30.553.13.0-32.573.13.0-33.583.13.0-34.603.13.0-35.623.13.0-36.633.13.0-37.643.13.0-39.663.13.0-40.693.13.0-41.70 |
3.13.0-77.121 |
linux-lts-utopicUbuntu:14.04:LTS |
before 3.16.0-60.80~14.04.1, plus listed versions 3.16.0-25.33~14.04.23.16.0-26.35~14.04.13.16.0-28.37~14.04.13.16.0-28.38~14.04.13.16.0-29.39~14.04.1 Show 29 moreShow less3.16.0-30.40~14.04.13.16.0-31.41~14.04.13.16.0-31.43~14.04.13.16.0-33.44~14.04.13.16.0-34.45~14.04.13.16.0-34.47~14.04.13.16.0-36.48~14.04.13.16.0-37.49~14.04.13.16.0-37.51~14.04.13.16.0-38.52~14.04.13.16.0-39.53~14.04.13.16.0-40.54~14.04.13.16.0-41.55~14.04.13.16.0-41.57~14.04.13.16.0-43.58~14.04.13.16.0-44.59~14.04.13.16.0-45.60~14.04.13.16.0-46.62~14.04.13.16.0-48.64~14.04.13.16.0-49.65~14.04.13.16.0-50.66~14.04.13.16.0-50.67~14.04.13.16.0-51.69~14.04.13.16.0-52.71~14.04.13.16.0-53.72~14.04.13.16.0-55.74~14.04.13.16.0-56.75~14.04.13.16.0-57.77~14.04.13.16.0-59.79~14.04.1 |
3.16.0-60.80~14.04.1 |
linux-lts-vividUbuntu:14.04:LTS |
before 3.19.0-49.55~14.04.1, plus listed versions 3.19.0-18.18~14.04.13.19.0-20.20~14.04.13.19.0-21.21~14.04.13.19.0-22.22~14.04.13.19.0-23.24~14.04.1 Show 14 moreShow less3.19.0-25.26~14.04.13.19.0-26.28~14.04.13.19.0-28.30~14.04.13.19.0-30.33~14.04.13.19.0-30.34~14.04.13.19.0-31.36~14.04.13.19.0-32.37~14.04.13.19.0-33.38~14.04.13.19.0-37.42~14.04.13.19.0-39.44~14.04.13.19.0-41.46~14.04.23.19.0-42.48~14.04.13.19.0-43.49~14.04.13.19.0-47.53~14.04.1 |
3.19.0-49.55~14.04.1 |
linux-lts-wilyUbuntu:14.04:LTS |
before 4.2.0-27.32~14.04.1, plus listed versions 4.2.0-18.22~14.04.14.2.0-19.23~14.04.14.2.0-21.25~14.04.14.2.0-22.27~14.04.14.2.0-23.28~14.04.14.2.0-25.30~14.04.1 |
4.2.0-27.32~14.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2015-8844 is a medium vulnerability (CVSS 5.5) in Linux Kernel, published April 27, 2016. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 32nd percentile. Fixed in linux 4.4.2-1.
References
kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5
openwall.com/lists/oss-security/2016/04/13/1
rhn.redhat.com/errata/RHSA-2016-2584.html
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
securitytracker.com/id/1035594
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github.com/torvalds/linux/commit/d2b9d2a5ad5ef04ff978c9923d19730cb05efd55
bugzilla.redhat.com/show_bug.cgi?id=1326540
nvd.nist.gov/vuln/detail/CVE-2015-8844
security-tracker.debian.org/tracker/CVE-2015-8844
access.redhat.com/errata/RHSA-2016:2574
security.access.redhat.com/data/csaf/v2/advisories/2016/rhsa-2016_2574.json
cve.org/CVERecord?id=CVE-2013-4312
seclists.org/oss-sec/2016/q1/194
lkml.org/lkml/2016/2/13/11
comments.gmane.org/gmane.linux.kernel/2214250
ubuntu.com/security/CVE-2015-8844
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