What is CVE-2017-10965?

CVE-2017-10965 is a critical-severity vulnerability in Irssi, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2017-07-07.

How severe is CVE-2017-10965?

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

NULL pointer dereference in Irssi

CVE-2017-10965

An issue was discovered in Irssi before 1.0.4. When receiving messages with invalid time stamps, Irssi would try to dereference a NULL pointer.

Published 2017-07-07 · 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: 0.034 (88.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000

Affected products

Irssi

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

www.debian.org/security/2017/dsa-4016 (vendor-advisory)
irssi.org/security/irssi_sa_2017_07.txt (Patch, Vendor Advisory)
github.com/irssi/irssi/commit/5e26325317c72a04c1610ad952974e206384d291 (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-10965?: CVE-2017-10965 is a critical-severity vulnerability in Irssi, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2017-07-07.
How severe is CVE-2017-10965?: Critical severity. CVSS v3 base score is 9.8 out of 10.