kernel: Mishandled interactions among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets resulting in a denial of service
Published Oct 8, 2018
4.9
MEDIUMCVSS 3.0
EPSS 0.40%
Description
The Linux kernel 4.14.67 mishandles certain interaction among XFRM Netlink messages, IPPROTO_AH packets, and IPPROTO_IP packets, which allows local users to cause a denial of service (memory consumption and system hang) by leveraging root access to execute crafted applications, as demonstrated on CentOS 7.
Affected products
No data.
- 4.14.67
No data.
Red Hat Enterprise Linux 5
kernel
Will not fix
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-alt
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise Linux 8
kernel
Will not fix
Red Hat Enterprise Linux 8
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
kernel-rt
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
At this time this flaws reproduction environment is considered too extraordinary and will rarely be a feasable attack vector for most attackers. The IPSEC connection between connected hosts is a somewhat privileged operation with a shared secret between systems, Red Hat will unlikely fix this issue due to its significant setup complexity and unlikely configuration.
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:H/UI:N/S:U/C:N/I:N/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:H/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 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.40% (0.00395) | 31.35th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.40% (0.00395) | 33.50th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.04% (0.00042) | 5.06th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.41% (0.00414) | 3.60th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.41% (0.00414) | 0.00th | v1 |
References (6)
- http://www.securityfocus.com/bid/105539 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2018-17977 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1637504 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2018-17977
- https://www.cve.org/CVERecord?id=CVE-2018-17977
- https://www.openwall.com/lists/oss-security/2018/10/05/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/105539 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2018-17977 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1637504 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-17977 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-17977 | ||
| https://www.openwall.com/lists/oss-security/2018/10/05/5 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory |
Change history (0)
No recorded changes yet.