{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"solanum-ircd/solanum","product":"solanum","source":"CNA: VulnCheck","vendor":"solanum-ircd","versions":[{"lessThan":"2ce64debf65e9710e9eea099ada93dbf6655b5ff","status":"affected","version":"0","versionType":"git"}]}],"cveId":"CVE-2026-121602","cwes":["CWE-122"],"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.","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"},{"score":8.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":6.5,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}],"modifiedAt":1793726291387,"publishedAt":1793723214160,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking","patch"],"url":"https://github.com/solanum-ircd/solanum/pull/551"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/solanum-ircd/solanum/commit/2ce64debf65e9710e9eea099ada93dbf6655b5ff"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/modules/core/m_join.c#L507"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/ircd/channel.c#L371-L385"},{"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-2ce64de-heap-buffer-overflow-via-join-and-sjoin"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/solanum-ircd/solanum"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/ircd/channel.c#L371-L385"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/modules/core/m_join.c#L507"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/solanum-ircd/solanum/commit/2ce64debf65e9710e9eea099ada93dbf6655b5ff"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/solanum-ircd/solanum/pull/551"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/solanum-before-commit-2ce64de-heap-buffer-overflow-via-join-and-sjoin"}],"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/551"},{"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/2ce64debf65e9710e9eea099ada93dbf6655b5ff"}],"revision":"b1b46281da707e70f02a4ad7e0943c46b35593d718c0a329e7bbe37c70d08dd2","sources":[{"modifiedAt":1793723214160,"name":"CNA: VulnCheck","retrievedAt":1793725923643,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121602"},{"modifiedAt":1793726291387,"name":"NVD","retrievedAt":1793730114115,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121602"}],"ssvc":null,"status":"published","title":"Solanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOIN","updatedAt":1793730114115}