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CVE-2026-121603 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/solanum-ircd/solanum	[email protected]
https://github.com/solanum-ircd/solanum/blob/7bc7e34c04711247b932666e19ae900cba884540/modules/core/m_kill.c#L277	[email protected]
https://github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61	[email protected]
https://github.com/solanum-ircd/solanum/pull/550	[email protected]
https://www.vulncheck.com/advisories/solanum-before-commit-2ea1382-buffer-overflow-via-server-to-server-kill-handler	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 3, 2026	CVE Modified	CISA-ADP
Nov 3, 2026	New CVE Received	[email protected]