CVE-2026-121603
Solanum before commit 2ea1382 Buffer Overflow via Server-to-Server KILL Handler
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
Solanum before commit 2ea1382 contains a buffer overflow vulnerability in ms_kill() that allows malicious linked servers to corrupt memory by sending an overlong kill reason. Attackers controlling a rogue or compromised peer server can send a reason exceeding KILLLEN that overflows a static 512-byte buffer, crashing the ircd or potentially achieving remote code execution.
| CWE | CWE-120 |
| Vendor | solanum-ircd |
| Product | solanum |
| Published | Nov 3, 2026 |
| Last Updated | Nov 3, 2026 |
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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 < 2ea1382e4262b212a91034258c466f0f6754cd61
References
github.com: https://github.com/solanum-ircd/solanum/pull/550 github.com: https://github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61 github.com: https://github.com/solanum-ircd/solanum/blob/7bc7e34c04711247b932666e19ae900cba884540/modules/core/m_kill.c#L277 github.com: https://github.com/solanum-ircd/solanum vulncheck.com: https://www.vulncheck.com/advisories/solanum-before-commit-2ea1382-buffer-overflow-via-server-to-server-kill-handler
Credits
Tristan Madani (Talence Security) aaronmdjones