CVE-2021-30465

runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.

CVSS v3.1 NVD

8.5 HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 GitHub

7.6 HIGHCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CVSS v2.0 NVD

6.0 MEDIUMAV:N/AC:M/Au:S/C:P/I:P/A:P

EPSS

6.60% chance of exploitation in the next 30 days, 93rd percentile

Published

2021-05-27

Updated

2024-08-03

Proof-of-concept exploits (1)

• raesene/vuln_pocs

References

• CVE Record
• NVD entry

Related

• CVE-2020-8554
• CVE-2020-8561
• CVE-2020-8562
• CVE-2022-23648
• CVE-2025-31133
• CVE-2026-31431