CVE-2026-101303 — 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 clas…
Published: 2026-10-15 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7