---
cve: "CVE-2026-101305"
severity: "HIGH"
cvss: 8.8
epss: "0.2%"
vendor: "FreeBSD"
kev: false
exploited: false
published: "2026-10-15 07:17:57"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-11-09T15:00:58+01:00"
---

# CVE-2026-101305

> 8.8 HIGH

## Beschreibung

renameat(2) did not enforce FD_RESOLVE_BENEATH on its directory arguments.  A jailed process could rename a directory relative to a restricted descriptor, then escape the jail root via fchdir(2).  This requires the directory to reside on a filesystem that is also reachable from the jail's root.

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.

## CNA-Record (Kanon, cvelistV5)

- CNA: **freebsd**
- State: PUBLISHED
- Stand: 2026-10-16 18:30:32

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-273** — Improper Check for Dropped Privileges
  The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

## BSI-Hinweise (deutsch)

- [FreeBSD Project FreeBSD OS: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-3664) — _BSI-Einstufung: hoch_
  Ein Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um seine Privilegien zu erhöhen, Sicherheitsmaßnahmen zu umgehen, Daten offenzulegen oder zu manipulieren oder Denial-of-Service-Zustände zu verursachen.

## Referenzen

- <https://security.freebsd.org/advisories/FreeBSD-SA-26:66.jail.asc>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-101305/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_