CVE-2026-101303: IPv6 UDP sendto(2) bypasses jail loopback restriction
Vendor fix available · Affected: FreeBSD · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 11% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- FreeBSD · FreeBSDfrom 15.1-RELEASE before p4; from 15.0-RELEASE before p14; from 14.5-RELEASE before p1; from 14.4-RELEASE before p10
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- FreeBSD
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-101303 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.