High severity7.5NVD Advisory· Published Oct 22, 2017· Updated Jun 17, 2026

CVE-2017-15721

Description

In Irssi before 1.0.5, certain incorrectly formatted DCC CTCP messages could cause a NULL pointer dereference. This is a separate, but similar, issue relative to CVE-2017-9468.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Irssi/Irssi2 versions
cpe:2.3:a:irssi:irssi:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:irssi:irssi:*:*:*:*:*:*:*:*range: <=1.0.4
- (no CPE)range: <1.0.5
Debian/linux3 versions
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
osv-coords2 versions
pkg:rpm/opensuse/irssi&distro=openSUSE%20Tumbleweed pkg:rpm/suse/irssi&distro=SUSE%20Package%20Hub%2012
< 1.2.3-2.4+ 1 more
- (no CPE)range: < 1.2.3-2.4
- (no CPE)range: < 1.0.5-32.1

Patches

Vulnerability mechanics

References

openwall.com/lists/oss-security/2017/10/22/4nvdMailing ListMitigationPatchThird Party Advisory
irssi.org/security/irssi_sa_2017_10.txtnvdMitigationPatchVendor Advisory
lists.debian.org/debian-lts-announce/2017/12/msg00022.htmlnvdMailing ListThird Party Advisory
www.debian.org/security/2017/dsa-4016nvdThird Party Advisory

News mentions

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cvss	0.488
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000