CVE-2026-121602— Solanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOIN

Quick assessment

Affected

solanum-ircd solanum

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在提交 2ce64de 之前的 Solanum 版本中存在一个基于堆的缓冲区溢出漏洞。恶意链接的服务器可以通过在 JOIN 或 SJOIN 消息中发送过长的频道名称来破坏内存。控制对等服务器的攻击者能够触发 ms_join 和 ms_sjoin 函数中的 strcpy 和 sprintf 溢出，从而导致 ircd 崩溃，甚至可能实现远程代码执行。

CVSS 6.5 · Medium Updated Nov 04, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Solanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOIN

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
solanum-ircd	solanum	0 ~ 2ce64debf65e9710e9eea099ada93dbf6655b5ff	-

II. Public POCs for CVE-2026-121602

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-121602

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Other References for CVE-2026-121602 (6)

https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/modules/core/m_join.c#L507 technical-description
https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/ircd/channel.c#L371-L385 technical-description
https://github.com/solanum-ircd/solanum/commit/2ce64debf65e9710e9eea099ada93dbf6655b5ff patch
https://github.com/solanum-ircd/solanum product
https://github.com/solanum-ircd/solanum/pull/551 issue-tracking patch
https://www.vulncheck.com/advisories/solanum-before-commit-2ce64de-heap-buffer-overflow-via-join-and-sjoin third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-121602

IV. Related Vulnerabilities

Same product: solanum

CVE-2026-121603
Solanum before commit 2ea1382 Buffer Overflow via Server-to-

Same vendor: solanum-ircd

CVE-2026-121603
Solanum before commit 2ea1382 Buffer Overflow via Server-to-

Same weakness: CWE-122