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CVE-2017-9468

25
FAUCET Score

CVE-2017-9468 describes a NULL pointer dereference vulnerability in Irssi versions prior to 1.0.3, affecting Debian Linux and Irssi itself. This critical flaw allows remote IRC servers to trigger a denial-of-service by sending a specially crafted DCC message lacking source nick/host information. Rated 7.5 HIGH on CVSS, the vulnerability is easily exploitable over the network with low complexity and no user interaction, leading to a complete loss of availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.0.2CPE matchmatch criteria
cpe:2.3:a:irssi:irssi:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 77th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: irssi
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: irssi

Vendor Advisories (1)

redhatCVE-2017-9468Low

irssi: Null pointer dereference while receiving a DCC message without source nick/host

Jun 7, 2017

References

openwall.com / lists/oss-security/2017/06/06/4
Mailing ListPatchThird Party Advisory
irssi.org / security/irssi_sa_2017_06.txt
PatchVendor Advisory
debian.org / security/2017/dsa-3885
Third Party Advisory
securityfocus.com / bid/99015
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038621
Third Party AdvisoryVDB Entry