CVE-2018-7054

Severity: critical (CVSS 9.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-02-15 · updated 2026-06-17
Weakness: CWE-416

Description

An issue was discovered in Irssi before 1.0.7 and 1.1.x before 1.1.1. There is a use-after-free when a server is disconnected during netsplits. NOTE: this issue exists because of an incomplete fix for CVE-2017-7191.

Affected products

Canonical Ubuntu Linux: 14.04, 16.04, 17.10
Debian Linux: 9.0
Irssi: before 1.0.7; 1.1.0 — fixed in 1.0.7

How to fix

Upgrade to a fixed version: Irssi 1.0.7. Check the vendor advisory for mitigations.

References

http://openwall.com/lists/oss-security/2018/02/15/1
https://irssi.org/security/irssi_sa_2018_02.txt
https://usn.ubuntu.com/3590-1/
https://usn.ubuntu.com/4046-1/
https://www.debian.org/security/2018/dsa-4162
http://openwall.com/lists/oss-security/2018/02/15/1
https://irssi.org/security/irssi_sa_2018_02.txt
https://usn.ubuntu.com/3590-1/
https://usn.ubuntu.com/4046-1/
https://www.debian.org/security/2018/dsa-4162

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