CVE-2026-121603highCWE-120

CVE-2026-121603: high-severity vulnerability in solanum-ircd solanum

Solanum before commit 2ea1382 Buffer Overflow via Server-to-Server KILL Handler

Published

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.5epss 0.8%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Affected products
solanum-ircd · solanum
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CVE-2026-121602HIGHSolanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOINEPSS 0.8%