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Vulnerability record · CVE-2018-5206 · published 6 January 2018

CVE-2018-5206: Irssi null pointer dereference vulnerability

Irssi · Irssi

When the channel topic is set without specifying a sender, Irssi before 1.0.6 may dereference a NULL pointer.

9.8 CVSS 3.0 Critical EPSS 2.2% · top 18.5% CWE-476 · NULL pointer dereference
9.8CVSS 3.0 base score, v2 7.5
2.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

When the channel topic is set without specifying a sender, Irssi before 1.0.6 may dereference a NULL pointer.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://irssi.org/security/irssi_sa_2018_01.txt PatchVendor Advisory
https://www.debian.org/security/2018/dsa-4162 Third Party Advisory
https://irssi.org/security/irssi_sa_2018_01.txt PatchVendor Advisory
https://www.debian.org/security/2018/dsa-4162 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-5206), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.