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Vulnerability record · CVE-2016-2233 · published 18 January 2017

CVE-2016-2233: Hexchat project hexchat memory buffer overflow vulnerability

Hexchat Project · Hexchat

Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.

7.5 CVSS 3.0 High EPSS 35% · top 1.6% CWE-119 · Memory buffer overflow
7.5CVSS 3.0 base score, v2 5.0
35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/95920
https://www.exploit-db.com/exploits/39657/ ExploitThird Party AdvisoryVDB Entry
http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.html ExploitThird Party AdvisoryVDB Entry
http://www.securityfocus.com/bid/95920
https://www.exploit-db.com/exploits/39657/ ExploitThird Party AdvisoryVDB Entry

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-2233), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.