What is CVE-2018-5742?

CVE-2018-5742 is a high-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2019-10-30.

How severe is CVE-2018-5742?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Isc Bind

CVE-2018-5742

While backporting a feature for a newer branch of BIND9, RedHat introduced a path leading to an assertion failure in buffer.c:420. Affects RedHat versions bind-9.9.4-65.el7 -> bind-9.9.4-72.el7. No ISC releases are affected. Other packages from other distributions who made the same error may also be affected.

Published 2019-10-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (74.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Isc Bind
Red Hat Bind9 — versions RedHat BIND9 bind-9.9.4-65.el7 -> bind-9.9.4-72.el7
Red Hat Enterprise Linux — versions 7.0

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

access.redhat.com/security/cve/cve-2018-5742 (Third Party Advisory)

Frequently asked questions

What is CVE-2018-5742?: CVE-2018-5742 is a high-severity vulnerability in Isc Bind, classified under Reachable Assertion. CVSS score: 7.5/10. Published 2019-10-30.
How severe is CVE-2018-5742?: High severity. CVSS v3 base score is 7.5 out of 10.