HIGH
CVE-2018-5390
CWE-400Published: August 6, 2018· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official 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.
Technical Analysis
CVE-2018-5390 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
a10networks1 product(s)
advanced core operating system
Canonical1 product(s)
ubuntu linux
Cisco13 product(s)
collaboration meeting roomsdigital network architecture centerexpresswayexpressway seriesmeeting managementnetwork assurance enginethreat grid-cloudwebex hybrid data securitywebex video meshtelepresence video communication server firmwaretelepresence video communication servertelepresence conductor firmware+1
Debian1 product(s)
debian linux
f514 product(s)
big-ip access policy managerbig-ip advanced firewall managerbig-ip analyticsbig-ip application acceleration managerbig-ip application security managerbig-ip domain name systembig-ip edge gatewaybig-ip fraud protection servicebig-ip global traffic managerbig-ip link controllerbig-ip local traffic managerbig-ip policy enforcement manager+2
HP2 product(s)
aruba airwave amparuba clearpass policy manager
Linux1 product(s)
linux kernel
Red Hat7 product(s)
virtualizationenterprise linux desktopenterprise linux serverenterprise linux server ausenterprise linux server eusenterprise linux server tusenterprise linux workstation
Source: NVD CPE · 91 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp
ADVISORYhttps://usn.ubuntu.com/3732-1/
ADVISORYhttps://usn.ubuntu.com/3732-2/
ADVISORYhttps://usn.ubuntu.com/3741-1/
ADVISORYhttps://usn.ubuntu.com/3741-2/
ADVISORYhttps://usn.ubuntu.com/3742-1/
ADVISORYhttps://usn.ubuntu.com/3742-2/
ADVISORYhttps://usn.ubuntu.com/3763-1/
ADVISORYhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180824-linux-tcp
ADVISORYhttps://usn.ubuntu.com/3732-1/
ADVISORYhttps://usn.ubuntu.com/3732-2/
ADVISORYhttps://usn.ubuntu.com/3741-1/
ADVISORYhttps://usn.ubuntu.com/3741-2/
ADVISORYhttps://usn.ubuntu.com/3742-1/
ADVISORYhttps://usn.ubuntu.com/3742-2/
ADVISORYhttps://usn.ubuntu.com/3763-1/
All References (84)
→
http://www.arubanetworks.com/assets/alert/ARUBA-PSA-2018-004.txtThird Party Advisory
→
→
http://www.openwall.com/lists/oss-security/2019/06/28/2Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2019/07/06/3Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2019/07/06/4Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/104976Third Party Advisory · VDB Entry
→
http://www.securitytracker.com/id/1041424Third Party Advisory · VDB Entry
→
http://www.securitytracker.com/id/1041434Third Party Advisory · VDB Entry
→
https://access.redhat.com/errata/RHSA-2018:2384Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2395Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2402Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2403Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2645Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2776Third Party Advisory
→
https://access.redhat.com/errata/RHSA-2018:2785Third Party Advisory
Quick Facts
CVE IDCVE-2018-5390
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-400
CISA KEVNo
Affected8 vendor(s)
PublishedAug 6, 2018
Related CVEs (CWE-400)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-5390 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.