CVE-2018-5703

Name: CVE-2018-5703
Creator: NVD / NIST
Published: 2018-01-16T09:29:00.42+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.65%

Last modified Jun 17, 2026

CVE-2018-5703 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11 allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via vectors involving TLS.. EPSS estimates a 2.65% chance of exploitation in the next 30 days.

Description

The tcp_v6_syn_recv_sock function in net/ipv6/tcp_ipv6.c in the Linux kernel through 4.14.11 allows attackers to cause a denial of service (slab out-of-bounds write) or possibly have unspecified other impact via vectors involving TLS.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.65%

83.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.13, < 4.14.86
Linux	Linux Kernel	>= 4.15, < 4.15.8

References

https://groups.google.com/d/msg/syzkaller-bugs/0PBeVnSzfqQ/5eXAlM46BQAJIssue Tracking, Mailing List, Third Party Advisory
https://groups.google.com/d/msg/syzkaller-bugs/0PBeVnSzfqQ/5eXAlM46BQAJIssue Tracking, Mailing List, Third Party Advisory

Timeline

Published: Jan 16, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5703?

How severe is CVE-2018-5703?

CVE-2018-5703 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.65% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5703?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5703?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST