What is CVE-2018-5703?

CVE-2018-5703 is a critical-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-01-16.

How severe is CVE-2018-5703?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-5703 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Linux Kernel

CVE-2018-5703

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.

Vulnerability class: Buffer Overflow

EPSS: 0.026 (83.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux Linux_kernel
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

cve@mitre.org (Mailing List, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2018-5703?: CVE-2018-5703 is a critical-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2018-01-16.
How severe is CVE-2018-5703?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-5703 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.