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No exploitation reportedFix available

CVE-2018-5390

No exploitation reported by the sources we read.

  • Published2018-08-06
  • WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2018-08-0620:29CVE publishedNVD
  2. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-5390?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-5390?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Cisco expressway
BranchAffectedFixed in
—= x8.10no fix published
—= x8.10.1no fix published
—= x8.10.2no fix published
—= x8.10.3no fix published
—= x8.10.4no fix published
—= x8.11no fix published
Cisco telepresence video communication server firmwareversion to verify
BranchAffectedFixed in
—= x8.10no fix published
—= x8.10.1no fix published
—= x8.10.2no fix published
—= x8.10.3no fix published
—= x8.10.4no fix published
—= x8.11no fix published
Redhat enterprise linux server aus
BranchAffectedFixed in
6.4= 6.4no fix published
6.5= 6.5no fix published
6.6= 6.6no fix published
7.2= 7.2no fix published
7.3= 7.3no fix published
7.4= 7.4no fix published

35 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.07.8read 2026-10-23
  • CNAweakness (CWE)CWE-400read 2026-10-23
  • NVDweakness (CWE)CWE-400read 2026-10-23
  • FIRST EPSSEPSS score71.8 %read 2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2018-08-06
Last Modified
2026-06-17
NVD status
Modified

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.

Is CVE-2018-5390 actively exploited?

Active exploitation of CVE-2018-5390 has not been confirmed. Its EPSS score was 71.8% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-5390?

CVE-2018-5390 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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