CVE-2026-101303
highThe 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.
Vendor / product: Freebsd — freebsd
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.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-10-15 07:17
Modified: 2026-10-20 00:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:03 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
freebsd / freebsd 14.4, 14.5, 15.0, 15.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://security.freebsd.org/advisories/FreeBSD-SA-26:69.udp.asc
Patch / mitigation: https://security.freebsd.org/advisories/FreeBSD-SA-26:69.udp.asc
References
- https://security.freebsd.org/advisories/FreeBSD-SA-26:69.udp.asc secteam@freebsd.org
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:03 UTC · record ↗