kernel: Off-by-one error in selinux_setprocattr (/proc/self/attr/fscreate)
Published Jul 27, 2018
5.5
MEDIUMCVSS 3.0
EPSS 0.46%
Description
A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.
Affected products
-
- Version 4.9.10StatusaffectedConstraints-
- Version
Configuration 1
- < 4.9.10
Configuration 2
- 8.0
- 7.0
- 7.0
- 7.0
- 7.3
- 7.4
- 7.3
- 7.4
- 7.5
- 7.0
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-514.16.1.el7
Fixed · RHSA-2017:0933
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-514.16.1.rt56.437.el7
Fixed · RHSA-2017:0931
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-514.rt56.219.el6rt
Fixed · RHSA-2017:0932
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-514.16.1.el7 | Fixed | RHSA-2017:0933 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-514.16.1.rt56.437.el7 | Fixed | RHSA-2017:0931 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-514.rt56.219.el6rt | Fixed | RHSA-2017:0932 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | 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 due to a missing commit ( bb646cdb12e75d82258c2f2e7746d5952d3e321a ) which enabled changed system behavior. This issue does affect Red Hat Enteprise Linux 7 and MRG-2 kernels. A future Linux kernel updates for the respective releases may address this issue.
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:N/I:N/A:H
AV:L/AC:L/Au:N/C:N/I:N/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
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.46% (0.00459) | 37.46th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.46% (0.00459) | 36.14th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.05% (0.00053) | 13.87th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.06% (0.00062) | 28.60th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.06% (0.00062) | 26.81th | v3 (v2023.03.01) |
| Jul 21, 2023 | 0.06% (0.00062) | 24.80th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00045) | 12.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.10% (0.01104) | 54.09th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.10% (0.01104) | 53.53th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.28% (0.01282) | 67.60th | 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) |
| Feb 3, 2022 | 1.86% (0.01865) | 48.06th | v1 |
| Jan 6, 2022 | 1.86% (0.01865) | 47.54th | v1 |
| Sep 1, 2021 | 1.86% (0.01865) | 76.13th | v1 |
| Apr 14, 2021 | 1.86% (0.01865) | 0.00th | v1 |
References (12)
- http://www.securityfocus.com/bid/96272 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2017:0931 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0932 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2017:0933 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-2618 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1419916 Issue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2618 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0c461cb727d146c9ef2d3e86214f498b78b7d125 x_refsource_CONFIRMPatchVendor Advisory
- https://marc.info/?l=selinux&m=148588165923772&w=2 mailing-listx_refsource_MLISTPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2017-2618
- https://www.cve.org/CVERecord?id=CVE-2017-2618
- https://www.debian.org/security/2017/dsa-3791 vendor-advisoryx_refsource_DEBIANThird Party Advisory
Change history (0)
No recorded changes yet.