The IPv6 UDP send path for unconnected sockets did not apply the jail policy of rewriting a loopback destination address to the jail's primary IPv6 address.

A process in a classic (non-VNET) jail can send UDP datagrams to services listening on the host's IPv6 loopback address, bypassing jail network isolation.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 17 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 16 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Freebsd
Freebsd freebsd
Vendors & Products Freebsd
Freebsd freebsd

Fri, 16 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}


Thu, 15 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Description The IPv6 UDP send path for unconnected sockets did not apply the jail policy of rewriting a loopback destination address to the jail's primary IPv6 address. A process in a classic (non-VNET) jail can send UDP datagrams to services listening on the host's IPv6 loopback address, bypassing jail network isolation.
Title IPv6 UDP sendto(2) bypasses jail loopback restriction
Weaknesses CWE-941
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published:

Updated: 2026-10-16T18:36:07.211Z

Reserved: 2026-09-28T13:33:02.323Z

Link: CVE-2026-101303

cve-icon Vulnrichment

Updated: 2026-10-16T18:35:51.123Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-10-15T07:17:57.437

Modified: 2026-10-16T19:16:57.530

Link: CVE-2026-101303

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T22:45:14Z

Weaknesses