CVE-2026-101303
Published:October 15, 2026
Updated:October 20, 2026
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.
Affected Packages
https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/14.4.0 <release/14.4.0-p10Fix Suggestion:
Update to version release/14.4.0-p10https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/15.1.0 <release/15.1.0-p4Fix Suggestion:
Update to version release/15.1.0-p4https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) >=release/15.0.0 <release/15.0.0-p14Fix Suggestion:
Update to version release/15.0.0-p14https://github.com/freebsd/freebsd-src.git (GITHUB):
Affected version(s) =release/14.5.0 <release/14.5.0-p1Fix Suggestion:
Update to version release/14.5.0-p1Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Incorrectly Specified Destination in a Communication Channel
EPSS
Base Score:
0.36