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No exploitation reportedFix available

CVE-2026-101306

Multiple jail filesystem root escapes

No exploitation reported by the sources we read.

  • Published2026-10-15
  • WeaknessCWE-273 · CWE-281

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket. A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.

Timeline

dates in UTC
  1. 2026-10-1507:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-101306?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-101306?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Freebsd
BranchAffectedFixed in
14.4= 14.4no fix published
14.5= 14.5no fix published
15.0= 15.0no fix published
15.1= 15.1no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2026-10-16
  • OpenCVESSVC decisionnone—
  • CISA-ADPCVSS 3.19.82026-10-16
  • CNAweakness (CWE)CWE-273, CWE-281read 2026-10-23
  • FIRST EPSSEPSS score0.3 %2026-10-23

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-10-15
Last Modified
2026-10-20
NVD status
Analyzed

Frequently asked questions

What is CVE-2026-101306?

SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket. A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.

Is CVE-2026-101306 actively exploited?

Active exploitation of CVE-2026-101306 has not been confirmed. Its EPSS score was 0.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-101306?

CVE-2026-101306 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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