---
cve: "CVE-2024-21626"
severity: "HIGH"
cvss: 8.6
epss: "18.1%"
vendor: "opencontainers"
kev: false
exploited: false
published: "2024-01-31 22:15:53"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:21:05+02:00"
---

# CVE-2024-21626

> 8.6 HIGH · 🧪 PoC

## Beschreibung

runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem ("attack 2"). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run ("attack 1"). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes ("attack 3a" and "attack 3b"). runc 1.1.12 includes patches for this issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 51d5e94601ceffbbd85688df1c928ecccbfa4685 (Commit)

## Referenzen

- <https://github.com/opencontainers/runc/security/advisories/GHSA-xr7r-f8xq-vfvv>
- <https://github.com/opencontainers/runc/commit/02120488a4c0fc487d1ed2867e901eeed7ce8ecf>
- <https://github.com/opencontainers/runc/releases/tag/v1.1.12>
- <http://www.openwall.com/lists/oss-security/2024/02/01/1>
- <http://www.openwall.com/lists/oss-security/2024/02/02/3>
- <http://packetstormsecurity.com/files/176993/runc-1.1.11-File-Descriptor-Leak-Privilege-Escalation.html>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SYMO3BANINS6RGFQFKPRG4FIOJ7GWYTL/>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2NLXNE23Q5ESQUAI22Z7A63JX2WMPJ2J/>
- <https://lists.debian.org/debian-lts-announce/2024/02/msg00005.html>
- <https://www.vicarius.io/vsociety/posts/leaky-vessels-part-1-cve-2024-21626>
- <https://access.redhat.com/errata/RHSA-2024:0645>
- <https://access.redhat.com/errata/RHSA-2024:0662>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-21626) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_