What is CVE-2019-18603?

CVE-2019-18603 is a medium-severity vulnerability in Openafs, classified under Use of Uninitialized Resource. CVSS score: 5.9/10. Published 2019-10-29.

How severe is CVE-2019-18603?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Openafs

CVE-2019-18603

OpenAFS before 1.6.24 and 1.8.x before 1.8.5 is prone to information leakage upon certain error conditions because uninitialized RPC output variables are sent over the network to a peer.

Published 2019-10-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.012 (67.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Openafs
Debian Linux — versions 8.0

Weakness classification (CWE)

CWE-908 — Use of Uninitialized Resource

References

openafs.org/pages/security/OPENAFS-SA-2019-001.txt (Vendor Advisory)
lists.debian.org/debian-lts-announce/2019/11/msg00002.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2019-18603?: CVE-2019-18603 is a medium-severity vulnerability in Openafs, classified under Use of Uninitialized Resource. CVSS score: 5.9/10. Published 2019-10-29.
How severe is CVE-2019-18603?: Medium severity. CVSS v3 base score is 5.9 out of 10.