What is CVE-2017-9469?

CVE-2017-9469 is a high-severity vulnerability in Irssi, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-06-07.

How severe is CVE-2017-9469?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Irssi

CVE-2017-9469

In Irssi before 1.0.3, when receiving certain incorrectly quoted DCC files, it tries to find the terminating quote one byte before the allocated memory. Thus, remote attackers might be able to cause a crash.

Vulnerability class: Buffer Overflow

Published 2017-06-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.061 (93.2th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.061 · newest: 0.061 · change: 0.000

Affected products

Irssi
Debian Linux — versions 8.0, 9.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.debian.org/security/2017/dsa-3885 (vendor-advisory, Third Party Advisory)
openwall.com/lists/oss-security/2017/06/06/4 (Patch, Mailing List, Third Party Advisory)
irssi.org/security/irssi_sa_2017_06.txt (Patch, Vendor Advisory)
www.securityfocus.com/bid/99043 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1038621 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-9469?: CVE-2017-9469 is a high-severity vulnerability in Irssi, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-06-07.
How severe is CVE-2017-9469?: High severity. CVSS v3 base score is 7.5 out of 10.