Unrated
IPv6 UDP sendto(2) bypasses jail loopback restriction
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.
Announced Source revision 1
Original source ↗CVE-2026-101303
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-101303
FreeBSD
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "FreeBSD",
"modules": [
"udp"
],
"product": "FreeBSD",
"versions": [
{
"status": "affected",
"version": "15.1-RELEASE",
"lessThan": "p4",
"versionType": "release"
},
{
"status": "affected",
"version": "15.0-RELEASE",
"lessThan": "p14",
"versionType": "release"
},
{
"status": "affected",
"version": "14.5-RELEASE",
"lessThan": "p1",
"versionType": "release"
},
{
"status": "affected",
"version": "14.4-RELEASE",
"lessThan": "p10",
"versionType": "release"
}
],
"defaultStatus": "unknown"
}
]- Related CVEs
- CVE-2026-101303
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #32916 · Revision 1
- Added to Heist Feed
- Publisher date