CVE-2024-21626
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.6
- CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- EPSS probability
- 18.09%
- CWE
- CWE-403, CWE-668
- Published
- 2024-01-31
- Last modified
- 2026-08-24
Affected products
- opencontainers runc
Weakness type
Related vulnerabilities
- CVE-2026-33263 — When mail_max_userip_connections is set (default 10) and reached, submission-login can crash with...
- CVE-2026-16526 — Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability
- CVE-2026-40042 — Pachno 1.0.6 Wiki TextParser XML External Entity Injection
- CVE-2024-58280 — CMSimple 5.15 Remote Command Execution via Extensions Configuration