What is CVE-2019-5882?

CVE-2019-5882 is a critical-severity vulnerability in Irssi, classified under Use After Free. CVSS score: 9.8/10. Published 2019-01-09.

How severe is CVE-2019-5882?

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

Use After Free in Irssi

CVE-2019-5882

Irssi 1.1.x before 1.1.2 has a use after free when hidden lines are expired from the scroll buffer.

Vulnerability class: Use-After-Free

Published 2019-01-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.025 (84.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000

Affected products

Irssi
Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04

Weakness classification (CWE)

CWE-416 — Use After Free

References

irssi.org/security/irssi_sa_2019_01.txt (Vendor Advisory)
irssi.org/NEWS/ (Vendor Advisory)
github.com/irssi/irssi/pull/948 (Patch, Third Party Advisory)
usn.ubuntu.com/3862-1/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2019-5882?: CVE-2019-5882 is a critical-severity vulnerability in Irssi, classified under Use After Free. CVSS score: 9.8/10. Published 2019-01-09.
How severe is CVE-2019-5882?: Critical severity. CVSS v3 base score is 9.8 out of 10.