[ CVE-2026-121603 · Published 3 Nov 2026 ]
Vulnerability in solanum-ircd solanum
CVSS 6.5
EPSS <1%No fix listed yet
[ Description ]Official 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.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/solanum-ircd/solanum
- github.com/solanum-ircd/solanum/blob/7bc7e34c04711247b932666e19ae900cba884540/modules/c…
- github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61
- github.com/solanum-ircd/solanum/pull/550
- www.vulncheck.com/advisories/solanum-before-commit-2ea1382-buffer-overflow-via-server-t…