CVE-2016-2233
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 34.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 34.10% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 4 April 2016
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- hexchat project/hexchat
- Source
- cve@mitre.org
EPSS moved from 27.2% on 21 September 2026 to 34.1% on 26 October 2026, peaking at 34.9% on 22 September 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95920
- https://www.exploit-db.com/exploits/39657/Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/136563/Hexchat-IRC-Client-2.11.0-CAP-LS-Handling-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95920
- https://www.exploit-db.com/exploits/39657/Exploit, Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.