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Back to active CVEs
Unknown severity ยท Source severity not reportedCVE-2026-101306

Multiple jail filesystem root escapesCVE-2026-101306

Answer in brief

CVE-2026-101306 records a Unknown severity vulnerability in Multiple jail filesystem root escapes. The current sources do not mark it as known exploited. The current feed maps FreeBSD/FreeBSD (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 15, 2026Updated Oct 15, 2026Source checked Oct 15, 2026First seen by HOL Oct 15, 2026Material review Oct 15, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps FreeBSD/FreeBSD (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
FreeBSD/FreeBSDgeneric>=15.1-RELEASE <p4 || >=15.0-RELEASE <p14 || >=14.5-RELEASE <p1 || >=14.4-RELEASE <p10p4, p14, p1, p10

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for FreeBSD/FreeBSD.
  2. 2Review the reported fix. Update FreeBSD/FreeBSD to p4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 15, 2026

Sources and claim methodology

  • Source referencesecurity.freebsd.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Remote DoS via receive-side kernel TLSSame freebsd/freebsd package
  • IPv6 UDP sendto(2) bypasses jail loopback restrictionSame freebsd/freebsd package
  • Multiple jail filesystem root escapesSame freebsd/freebsd package
  • Multiple jail filesystem root escapesSame freebsd/freebsd package
  • Remotely triggerable buffer overflow in tcp_rackSame freebsd/freebsd package
  • TOCTOU race between sound(4) buffer resizing and mmapSame freebsd/freebsd package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-273, CWE-281
Source
CVE List V5
Source checked
Oct 15, 2026
References
1 linked source
Open source record