{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"solanum-ircd/solanum","product":"solanum","source":"CNA: VulnCheck","vendor":"solanum-ircd","versions":[{"lessThan":"2ea1382e4262b212a91034258c466f0f6754cd61","status":"affected","version":"0","versionType":"git"}]}],"cveId":"CVE-2026-121603","cwes":["CWE-120"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.5,"severity":"high","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}],"modifiedAt":1793726233585,"publishedAt":1793723214889,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/solanum-ircd/solanum/pull/550"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/solanum-ircd/solanum/blob/7bc7e34c04711247b932666e19ae900cba884540/modules/core/m_kill.c#L277"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/solanum-ircd/solanum"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/solanum-before-commit-2ea1382-buffer-overflow-via-server-to-server-kill-handler"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/solanum-ircd/solanum/pull/550"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/solanum-ircd/solanum/commit/2ea1382e4262b212a91034258c466f0f6754cd61"}],"revision":"1ae3eb95338f21f41790113ef5b2641de254af600479986fc603657e3e9bc7f4","sources":[{"modifiedAt":1793726233585,"name":"CNA: VulnCheck","retrievedAt":1793729394349,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121603"}],"ssvc":{"assessedAt":1793726157210,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Solanum before commit 2ea1382 Buffer Overflow via Server-to-Server KILL Handler","updatedAt":1793729394349}