CVE-2026-121602 json
Solanum before commit 2ce64de Heap Buffer Overflow via JOIN and SJOIN
published 6d ago modified 6d ago also EUVD-2026-116037
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- github.com/solanum-ircd/solanum@2ce64de commit
- github.com/solanum-ircd/solanum#551 pull request
Is CVE-2026-121602 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6d ago
Exploit prediction
0.84% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.5 | 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 |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
| CNA | 4.0 | 8.5 | 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 |
Affected products
- solanum-ircd solanum
Classification
- Weakness
-
- CWE-122 Heap-based Buffer Overflow
References
-
github.com
/solanum-ircd/solanum/pull/551
issue-tracking, patch
-
github.com
/solanum-ircd/solanum/commit/2ce64debf65e9710e9eea099ada93dbf6655b5ff
patch
-
github.com
/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/modules/core/m_join.c#L507
technical-description
-
github.com
/solanum-ircd/solanum/blob/2ea1382e4262b212a91034258c466f0f6754cd61/ircd/channel.c#L371-L385
technical-description
-
github.com
/solanum-ircd/solanum
product
-
vulncheck.com
/advisories/solanum-before-commit-2ce64de-heap-buffer-overflow-via-join-and-sjoin
third-party-advisory
Sources
- CVE List CVE-2026-121602
- NVD CVE-2026-121602
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.