Medium severity6.5NVD Advisory· Published Nov 3, 2026· Updated Nov 3, 2026
CVE-2026-121603
CVE-2026-121603
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.
Affected products
1- Range: < commit 2ea1382
Patches
Vulnerability mechanics
References
4- github.com/solanum-ircd/solanum/blob/7bc7e34c04711247b932666e19ae900cba884540/modules/core/m_kill.cnvd
- github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61nvd
- github.com/solanum-ircd/solanum/pull/550nvd
- www.vulncheck.com/advisories/solanum-before-commit-2ea1382-buffer-overflow-via-server-to-server-kill-handlernvd
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