CVE-2017-5972
The TCP stack in the Linux kernel 3.x does not properly implement a SYN cookie protection mechanism for the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many TCP SYN packets,…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 23.9%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
Description
The TCP stack in the Linux kernel 3.x does not properly implement a SYN cookie protection mechanism for the case of a fast network connection, which allows remote attackers to cause a denial of service (CPU consumption) by sending many TCP SYN packets, as demonstrated by an attack against the kernel-3.10.0 package in CentOS Linux 7. NOTE: third parties have been unable to discern any relationship between the GitHub Engineering finding and the Trigemini.c attack code.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 23.89% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 12 February 2017
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
EPSS 23.9% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://seclists.org/oss-sec/2017/q1/573Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96231Third Party Advisory, VDB Entry
- https://access.redhat.com/security/cve/cve-2017-5972Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1422081Issue Tracking, Third Party Advisory
- https://cxsecurity.com/issue/WLB-2017020112Exploit, Third Party Advisory
- https://githubengineering.com/syn-flood-mitigation-with-synsanity/Third Party Advisory
- https://packetstormsecurity.com/files/141083/CentOS7-Kernel-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- https://security-tracker.debian.org/tracker/CVE-2017-5972Third Party Advisory
- https://www.exploit-db.com/exploits/41350/Third Party Advisory, VDB Entry
- http://seclists.org/oss-sec/2017/q1/573Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/96231Third Party Advisory, VDB Entry
- https://access.redhat.com/security/cve/cve-2017-5972Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1422081Issue Tracking, Third Party Advisory
- https://cxsecurity.com/issue/WLB-2017020112Exploit, Third Party Advisory
- https://githubengineering.com/syn-flood-mitigation-with-synsanity/Third Party Advisory
- https://packetstormsecurity.com/files/141083/CentOS7-Kernel-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- https://security-tracker.debian.org/tracker/CVE-2017-5972Third Party Advisory
- https://www.exploit-db.com/exploits/41350/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.