kernel: improper keyrings creation
Published May 18, 2018
7.1
HIGHCVSS 3.0
EPSS 0.41%
Description
In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.
Affected products
No data.
- < 4.13.5
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-862.el7
Fixed · RHSA-2018:1062
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-693.21.1.rt56.639.el7
Fixed · RHSA-2018:0412
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Out of support scope
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise MRG 2
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-862.el7 | Fixed | RHSA-2018:1062 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-693.21.1.rt56.639.el7 | Fixed | RHSA-2018:0412 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Out of support scope | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
The impact is Moderate, because the impact is only for userspace programs if using keyctl incorrectly. For root-level processes (usually during boot) keyctl being used securely without possibility of leaking keys between users.
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:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
AV:L/AC:L/Au:N/C:N/I:P/A:P
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 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.41% (0.00406) | 32.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00421) | 33.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00016) | 2.02th | 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 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.38% (0.01379) | 32.02th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.38% (0.01379) | 0.00th | v1 |
References (14)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3 x_refsource_CONFIRMPatch
- http://kernsec.org/pipermail/linux-security-module-archive/2017-September/003318.html
- http://www.securityfocus.com/bid/104254 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2017-18270 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1580979 x_refsource_MISCIssue Tracking
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11 x_refsource_MISC
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9 x_refsource_MISC
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3
- https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3 x_refsource_CONFIRMPatch
- https://nvd.nist.gov/vuln/detail/CVE-2017-18270
- https://support.f5.com/csp/article/K37301725 x_refsource_CONFIRM
- https://usn.ubuntu.com/3754-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2017-18270
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 x_refsource_CONFIRMRelease Notes
Change history (0)
No recorded changes yet.