NULL pointer dereference in Irssi

CVE-2018-5206

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

EPSS: 0.022 (80.3th percentile) — read the EPSS interpretation.

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.

Affected products

Irssi
Debian Debian_linux — versions 9.0
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2018-5206?: CVE-2018-5206 is a critical-severity vulnerability in Irssi, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2018-01-06.
How severe is CVE-2018-5206?: Critical severity. CVSS v3 base score is 9.8 out of 10.