What is CVE-2019-15522?

CVE-2019-15522 is a critical-severity vulnerability in Linbit Csync2. CVSS score: 9.8/10. Published 2020-03-20.

How severe is CVE-2019-15522?

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

Vulnerability in Linbit Csync2

CVE-2019-15522

An issue was discovered in LINBIT csync2 through 2.0. csync_daemon_session in daemon.c neglects to force a failure of a hello command when the configuration requires use of SSL.

Published 2020-03-20 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.019 (79.6th percentile), scored 2026-10-25.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000

Affected products

Linbit Csync2

References

github.com/LINBIT/csync2/commit/416f1de878ef97e27e27508914f7ba8599a0be22 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2019-15522?: CVE-2019-15522 is a critical-severity vulnerability in Linbit Csync2. CVSS score: 9.8/10. Published 2020-03-20.
How severe is CVE-2019-15522?: Critical severity. CVSS v3 base score is 9.8 out of 10.