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CVE-2017-9469

28
FAUCET Score

CVE-2017-9469 describes a heap-based buffer under-read vulnerability in Irssi versions prior to 1.0.3, affecting Debian Linux distributions. This flaw occurs when Irssi processes malformed DCC file quotes, causing it to attempt to access memory before its allocated buffer. With a CVSS score of 7.5 (HIGH), this vulnerability allows remote attackers to trigger a denial-of-service (crash) without requiring user interaction. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), 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
6.08%
Probability of exploitation in next 30 days
EPSS Percentile
92.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0608 is in the 87th 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-2017-9469Low

irssi: Invalid read when receiving certain incorrectly quoted DCC files

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/99043
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038621
Third Party AdvisoryVDB Entry