CVE-2026-121602
Solanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOIN
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
Solanum before commit 2ce64de contains a heap-based buffer overflow vulnerability that allows a malicious linked server to corrupt memory by sending overlong channel names in JOIN or SJOIN messages. Attackers controlling a peer server can trigger strcpy and sprintf overflows in ms_join and ms_sjoin to crash the ircd or potentially achieve remote code execution.
| CWE | CWE-122 |
| Vendor | solanum-ircd |
| Product | solanum |
| Published | Nov 3, 2026 |
Stay Ahead of the Next One
Get instant alerts for solanum-ircd solanum
Be the first to know when new medium vulnerabilities affecting solanum-ircd solanum are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
solanum-ircd / solanum
0 < 2ce64debf65e9710e9eea099ada93dbf6655b5ff
References
github.com: https://github.com/solanum-ircd/solanum/pull/551 github.com: https://github.com/solanum-ircd/solanum/commit/2ce64debf65e9710e9eea099ada93dbf6655b5ff github.com: https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/modules/core/m_join.c#L507 github.com: https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/ircd/channel.c#L371-L385 github.com: https://github.com/solanum-ircd/solanum vulncheck.com: https://www.vulncheck.com/advisories/solanum-before-commit-2ce64de-heap-buffer-overflow-via-join-and-sjoin
Credits
Tristan Madani (Talence Security) aaronmdjones