--- title: "CVE-2018-5390: Linux kernel versions 4.9+ can be forced… | CubePath" description: "Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp_collapse_ofo_queue() and tcp_prune_ofo_queue() for every incoming packet…" language: en source: https://cubepath.com/security/cve/CVE-2018-5390 --- # CVE-2018-5390: Linux kernel versions 4.9+ can be forced… | CubePath ## Description Linux kernel versions 4.9+ can be forced to make very expensive calls to tcp\_collapse\_ofo\_queue() and tcp\_prune\_ofo\_queue() for every incoming packet which can lead to a denial of service. Official description from the CVE record, published by certcc. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-5390) ## Key data ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.71767 (71.8% probability) Percentile 99.4% Scores of Nov 10, 2026 Model v2026.06.15 ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-400](https://cwe.mitre.org/data/definitions/400.html) Uncontrolled Resource Consumption ## Affected products Products listed in the CVE record, as the CNA published them. - Linux Kernel - affected: 4.9 up to before 4.9\* ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [RHSA-2018:2785](https://access.redhat.com/errata/RHSA-2018:2785) (access.redhat.com) vendor-advisory - [VU#962459](https://www.kb.cert.org/vuls/id/962459) (kb.cert.org) third-party-advisory - [USN-3741-2](https://usn.ubuntu.com/3741-2/) (usn.ubuntu.com) vendor-advisory - [RHSA-2018:2776](https://access.redhat.com/errata/RHSA-2018:2776) (access.redhat.com) vendor-advisory - [RHSA-2018:2933](https://access.redhat.com/errata/RHSA-2018:2933) (access.redhat.com) vendor-advisory - [RHSA-2018:2403](https://access.redhat.com/errata/RHSA-2018:2403) (access.redhat.com) vendor-advisory - [RHSA-2018:2395](https://access.redhat.com/errata/RHSA-2018:2395) (access.redhat.com) vendor-advisory - [USN-3763-1](https://usn.ubuntu.com/3763-1/) (usn.ubuntu.com) vendor-advisory - [RHSA-2018:2384](https://access.redhat.com/errata/RHSA-2018:2384) (access.redhat.com) vendor-advisory - [USN-3741-1](https://usn.ubuntu.com/3741-1/) (usn.ubuntu.com) vendor-advisory - [RHSA-2018:2402](https://access.redhat.com/errata/RHSA-2018:2402) (access.redhat.com) vendor-advisory - [RHSA-2018:2948](https://access.redhat.com/errata/RHSA-2018:2948) (access.redhat.com) vendor-advisory - [USN-3742-2](https://usn.ubuntu.com/3742-2/) (usn.ubuntu.com) vendor-advisory - [1041434](http://www.securitytracker.com/id/1041434) (securitytracker.com) vdb-entry - [USN-3732-2](https://usn.ubuntu.com/3732-2/) (usn.ubuntu.com) vendor-advisory - [104976](http://www.securityfocus.com/bid/104976) (securityfocus.com) vdb-entry - [\[debian-lts-announce\] 20180815 \[SECURITY\] \[DLA 1466-1\] linux-4.9 security update](https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html) (lists.debian.org) mailing-list - [1041424](http://www.securitytracker.com/id/1041424) (securitytracker.com) vdb-entry - [USN-3742-1](https://usn.ubuntu.com/3742-1/) (usn.ubuntu.com) vendor-advisory - [RHSA-2018:2924](https://access.redhat.com/errata/RHSA-2018:2924) (access.redhat.com) vendor-advisory - [20180824 Linux and FreeBSD Kernels TCP Reassembly Denial of Service Vulnerabilities Affecting Cisco Products: August 2018](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp) (tools.cisco.com) vendor-advisory - [RHSA-2018:2789](https://access.redhat.com/errata/RHSA-2018:2789) (access.redhat.com) vendor-advisory - [DSA-4266](https://www.debian.org/security/2018/dsa-4266) (debian.org) vendor-advisory - [RHSA-2018:2645](https://access.redhat.com/errata/RHSA-2018:2645) (access.redhat.com) vendor-advisory - [USN-3732-1](https://usn.ubuntu.com/3732-1/) (usn.ubuntu.com) vendor-advisory - [RHSA-2018:2791](https://access.redhat.com/errata/RHSA-2018:2791) (access.redhat.com) vendor-advisory - [RHSA-2018:2790](https://access.redhat.com/errata/RHSA-2018:2790) (access.redhat.com) vendor-advisory - [\[oss-security\] 20190628 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/06/28/2) (openwall.com) mailing-list - [\[oss-security\] 20190706 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/07/06/3) (openwall.com) mailing-list - [\[oss-security\] 20190706 Re: linux-distros membership application - Microsoft](http://www.openwall.com/lists/oss-security/2019/07/06/4) (openwall.com) mailing-list - [oracle.com/security-alerts/cpujul2020.html](https://www.oracle.com/security-alerts/cpujul2020.html) - [oracle.com/technetwork/security-advisory/cpujan2019-5072801…](https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html) - [help.ecostruxureit.com/display/public/UADCE725/Security+fix…](https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0) - [security.netapp.com/advisory/ntap-20180815-0003](https://security.netapp.com/advisory/ntap-20180815-0003/) - [arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt](http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt) - [synology.com/support/security/Synology\_SA\_18\_41](https://www.synology.com/support/security/Synology%5FSA%5F18%5F41) - [support.f5.com/csp/article/K95343321](https://support.f5.com/csp/article/K95343321) - [a10networks.com/support/security-advisories/tcp-ip-cve-2018…](https://www.a10networks.com/support/security-advisories/tcp-ip-cve-2018-5390-segmentsmack) - [git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commi…](https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=1a4f14bab1868b443f0dd3c55b689a478f82e72e) - [support.f5.com/csp/article/K95343321?utm\_source=f5support&a…](https://support.f5.com/csp/article/K95343321?utm%5Fsource=f5support&%3Butm%5Fmedium=RSS) - [cert-portal.siemens.com/productcert/pdf/ssa-377115.pdf](https://cert-portal.siemens.com/productcert/pdf/ssa-377115.pdf) - [huawei.com/en/psirt/security-advisories/huawei-sa-20181031-…](http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20181031-02-linux-en) ## Timeline 1. ID reserved Jan 12, 2018 2. Record published Aug 6, 2018 3. Record last updated Aug 5, 2024 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 20:01 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)