What is CVE-2019-10203?

CVE-2019-10203 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Conversion between Numeric Types. CVSS score: 4.3/10. Published 2019-11-22.

How severe is CVE-2019-10203?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Linux Kernel

CVE-2019-10203

PowerDNS Authoritative daemon , pdns versions 4.0.x before 4.0.9, 4.1.x before 4.1.11, exiting when encountering a serial between 2^31 and 2^32-1 while trying to notify a slave leads to DoS.

Published 2019-11-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.016 (74.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.1% 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

Linux Kernel
Powerdns Authoritative Server
Red Hat Pdns — versions pdns versions 4.0.x before 4.0.9, 4.1.x before 4.1.11

Weakness classification (CWE)

CWE-681 — Incorrect Conversion between Numeric Types

References

bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2019-06.ht… (Vendor Advisory)

Frequently asked questions

What is CVE-2019-10203?: CVE-2019-10203 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Conversion between Numeric Types. CVSS score: 4.3/10. Published 2019-11-22.
How severe is CVE-2019-10203?: Medium severity. CVSS v3 base score is 4.3 out of 10.