CVE-2026-87734 Details
Description
An issue was discovered in the utcp package before 0.0.6 for OCaml. Out-of-order segment reassembly allows remote denial of service.
A denial-of-service vulnerability has been identified in the utcp package for OCaml, prior to version 0.0.6. The issue arises from out-of-order segment reassembly, which allows a remote peer to send small, disordered segments that do not fill the expected gaps. This behavior can overwhelm the receiving application, causing significant CPU usage without a limit on the number of connections that can be exploited.
Users can upgrade to utcp version 0.0.6, which addresses this vulnerability by implementing a more efficient reassembly queue using a red-black binary tree, rather than a flat list.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2026CISA-ADP
Assessed Sep 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://osv.dev/vulnerability/OSEC-2026-11 | CISA-ADP | AdvisoryExploitRemedy |
| https://osv.dev/vulnerability/OSEC-2026-11 | [email protected] | AdvisoryExploitRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-923 | Improper Restriction of Communication Channel to Intended Endpoints | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| utcp | < 0.0.6 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2026 | New CVE Received | [email protected] |