CVE-2018-5390

CVE-2018-5390 is a high-severity vulnerability in Redhat Virtualization with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 74% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-400.

Key facts

• Severity: High (CVSS 3.x base score 7.5)
• CVSS v2: 7.8
• EPSS exploit prediction: 74% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-400
• Affected product: Redhat Virtualization
• Published: 2018-08-06
• Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-5390?

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.

How severe is CVE-2018-5390?

CVE-2018-5390 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-5390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 74% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-5390?

CVE-2018-5390 primarily affects Redhat Virtualization. In total, 98 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2018-5390?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-5390 published?

CVE-2018-5390 was published on 2018-08-06 and last updated on 2026-06-17.

References

• http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txt
• http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20181031-02-linux-en
• http://www.openwall.com/lists/oss-security/2019/06/28/2
• http://www.openwall.com/lists/oss-security/2019/07/06/3
• http://www.openwall.com/lists/oss-security/2019/07/06/4
• http://www.securityfocus.com/bid/104976
• http://www.securitytracker.com/id/1041424
• http://www.securitytracker.com/id/1041434
• https://access.redhat.com/errata/RHSA-2018:2384
• https://access.redhat.com/errata/RHSA-2018:2395
• https://access.redhat.com/errata/RHSA-2018:2402
• https://access.redhat.com/errata/RHSA-2018:2403
• https://access.redhat.com/errata/RHSA-2018:2645
• https://access.redhat.com/errata/RHSA-2018:2776
• https://access.redhat.com/errata/RHSA-2018:2785
• https://access.redhat.com/errata/RHSA-2018:2789
• https://access.redhat.com/errata/RHSA-2018:2790
• https://access.redhat.com/errata/RHSA-2018:2791
• https://access.redhat.com/errata/RHSA-2018:2924
• https://access.redhat.com/errata/RHSA-2018:2933
• https://access.redhat.com/errata/RHSA-2018:2948
• https://cert-portal.siemens.com/productcert/pdf/ssa-377115.pdf
• https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=1a4f14bab1868b443f0dd3c55b689a478f82e72e
• https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0
• https://lists.debian.org/debian-lts-announce/2018/08/msg00014.html
• https://security.netapp.com/advisory/ntap-20180815-0003/
• https://support.f5.com/csp/article/K95343321
• https://support.f5.com/csp/article/K95343321?utm_source=f5support&amp%3Butm_medium=RSS
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp
• https://usn.ubuntu.com/3732-1/

Affected products (98)

• cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.4:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:6.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:7.2:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:6.4:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:6.7:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:7.2:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:7.3:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:7.4:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_eus:7.5:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:6.6:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:7.2:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:7.3:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_server_tus:7.4:*:*:*:*:*:*:*
• cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc1:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc2:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc3:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc4:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc5:*:*:*:*:*:*
• cpe:2.3:o:linux:linux_kernel:4.18:rc6:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
• cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
• cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
• cpe:2.3:a:hp:aruba_airwave_amp:*:*:*:*:*:*:*:*
• cpe:2.3:a:hp:aruba_clearpass_policy_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_access_policy_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_advanced_firewall_manager:14.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*

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