---
cve: "CVE-2026-41579"
severity: "LOW"
cvss: 3.3
epss: "19%"
vendor: "opencontainers"
kev: false
exploited: false
published: "2026-07-01 00:02:08"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:20:40+02:00"
---

# CVE-2026-41579

> 3.3 LOW · 🧪 PoC

## Beschreibung

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions prior to 1.3.6, 1.4.0-rc.1, 1.4.0-rc.12, 1.5.0-rc.1, and 1.5.0-rc.1, when setting up the container rootfs, setupPtmx and setupDevSymlinks call os.Remove and os.Symlink with a filepath.Join string which allow an image with /dev as a symlink to trick runc into deleting files called ptmx on the host or creating a hardcoded set of symlinks with specific names and targets in an arbitrary pre-existing host directory. This issue is not exploitable under Docker, because Docker creates a top-level read-only layer that masks any malicious /dev symlink present in the container image — unlike some other Linux container tooling, whose higher-level runtimes built on runc remain exposed to exploitation via a malicious image. This issue has been fixed in versions 1.3.6, 1.4.3 and 1.5.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 491b69bab9fa206b984fb26ba07d3110d62e671f (Commit)
- bb14dabeb7185bb72c8c86735d090dcb20f36587 (Commit)

## Referenzen

- <https://github.com/opencontainers/runc/security/advisories/GHSA-xjvp-4fhw-gc47>
- <https://github.com/opencontainers/runc/commit/864db8042dbb>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-41579) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_