Answer in brief
CVE-2026-121603 records a High severity (CVSS 8.5) vulnerability in Solanum before commit 2ea1382 Buffer Overflow via Server-to-Server KILL Handler. The current sources do not mark it as known exploited. The current feed maps solanum-ircd/solanum (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps solanum-ircd/solanum (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| solanum-ircd/solanumgeneric | >=0 <2ea1382e4262b212a91034258c466f0f6754cd61 | 2ea1382e4262b212a91034258c466f0f6754cd61 |
Published upstream
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.