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CVE-2017-5972

40
FAUCET Score

CVE-2017-5972 describes a denial-of-service vulnerability in the TCP stack of Linux kernel 3.x, specifically affecting fast network connections. This flaw, demonstrated against CentOS Linux 7, stems from an improper SYN cookie protection mechanism, allowing remote attackers to consume CPU resources by flooding the system with TCP SYN packets. The vulnerability is rated as High severity (CVSS 7.5), requiring no authentication or user interaction, and leading to high availability impact. While not listed on the KEV catalog or showing active exploitation, public exploit code exists (EDB-41350), though there is minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, <= 3.19.8CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
23.89%
Probability of exploitation in next 30 days
EPSS Percentile
97.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-41350 · Feb 12, 2017
This CVE's current EPSS score of 0.2389 is in the 96th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (4)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2017-5972Moderate

kernel: SYN cookie protection mechanism not properly implemented

Feb 12, 2017

References

access.redhat.com / security/cve/cve-2017-5972
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
cxsecurity.com / issue/WLB-2017020112
ExploitThird Party Advisory
seclists.org / oss-sec/2017/q1/573
Mailing ListThird Party Advisory
githubengineering.com / syn-flood-mitigation-with-synsanity
Third Party Advisory
packetstormsecurity.com / files/141083/CentOS7-Kernel-Denial-Of-Service.html
ExploitThird Party AdvisoryVDB Entry
security-tracker.debian.org / tracker/CVE-2017-5972
Third Party Advisory
exploit-db.com / exploits/41350
Third Party AdvisoryVDB Entry
securityfocus.com / bid/96231
Third Party AdvisoryVDB Entry