CVE-2025-52565
container escape due to /dev/console mount and related races
Description
runc is a CLI tool for spawning and running containers according to the OCI specification. Versions 1.0.0-rc3 through 1.2.7, 1.3.0-rc.1 through 1.3.2, and 1.4.0-rc.1 through 1.4.0-rc.2, due to insufficient checks when bind-mounting `/dev/pts/$n` to `/dev/console` inside the container, an attacker can trick runc into bind-mounting paths which would normally be made read-only or be masked onto a path that the attacker can write to. This attack is very similar in concept and application to CVE-2025-31133, except that it attacks a similar vulnerability in a different target (namely, the bind-mount of `/dev/pts/$n` to `/dev/console` as configured for all containers that allocate a console). This happens after `pivot_root(2)`, so this cannot be used to write to host files directly -- however, as with CVE-2025-31133, this can load to denial of service of the host or a container breakout by providing the attacker with a writable copy of `/proc/sysrq-trigger` or `/proc/sys/kernel/core_pattern` (respectively). This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.
INFO
Published Date :
Nov. 6, 2025, 8:15 p.m.
Last Modified :
Nov. 12, 2025, 4:20 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update runc to versions 1.2.8, 1.3.3, or 1.4.0-rc.3.
- Ensure bind-mount checks are properly implemented.
Public PoC/Exploit Available at Github
CVE-2025-52565 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-52565.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-52565 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-52565
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Workaround for CVE-2025-52881: Fixes Docker/Podman breakage in Proxmox LXC containers caused by AppArmor incompatibility with runc 1.2.7+. Universal wrapper for community-scripts with automatic AppArmor configuration.
apparmor containers docker lxc podman proxmox runc security workaround cve-2025-52881
Shell
DEPRECATED See CVE-2025-31133, CVE-2025-52565, CVE-2025-52881
Shell JavaScript Dockerfile Makefile
A penetration toolkit for container environment
docker container penetration-testing-tools
Go Dockerfile C Python Shell Makefile HCL Assembly
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-52565 vulnerability anywhere in the article.
-
The Cyber Express
Researchers Uncover Critical runC Bugs Allowing Full Container Escape
Security researchers have revealed three serious vulnerabilities in runC, the Open Container Initiative (OCI)-compliant runtime that powers platforms such as Docker and Kubernetes, which could allow a ... Read more
-
CybersecurityNews
Critical runc Vulnerabilities Put Docker and Kubernetes Container Isolation at Risk
Three critical vulnerabilities in runc, the container runtime powering Docker, Kubernetes, and other containerization platforms. These flaws could allow attackers to escape container isolation and gai ... Read more
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BleepingComputer
Dangerous runC flaws could allow hackers to escape Docker containers
Three newly disclosed vulnerabilities in the runC container runtime used in Docker and Kubernetes could be exploited to bypass isolation restrictions and get access to the host system. The security is ... Read more
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seclists.org
runc container breakouts via procfs writes: CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881
Full Disclosure mailing list archives From: Aleksa Sarai via Fulldisclosure <fulldisclosure () seclists org> Date: Wed, 5 Nov 2025 20:53:08 +1100 | NOTE: This advisory was sent to <security-announce ( ... Read more
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seclists.org
Re: [oss-security] runc container breakouts via procfs writes: CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881
Full Disclosure mailing list archives From: "akendo () akendo eu" <akendo () akendo eu> Date: Thu, 6 Nov 2025 08:04:30 +0000 Thank you for sharing this. I wondered how big the impact of this vulnerabi ... Read more
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Daily CyberSecurity
OCI Fixes Container Escape Vulnerabilities in runc (CVE-2025-31133, CVE-2025-52565, CVE-2025-52881)
The Open Container Initiative (OCI) has released security updates to address three high-severity vulnerabilities affecting its container runtime runc, including flaws that could lead to container esca ... Read more
The following table lists the changes that have been made to the
CVE-2025-52565 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Nov. 06, 2025
Action Type Old Value New Value Added Description runc is a CLI tool for spawning and running containers according to the OCI specification. Versions 1.0.0-rc3 through 1.2.7, 1.3.0-rc.1 through 1.3.2, and 1.4.0-rc.1 through 1.4.0-rc.2, due to insufficient checks when bind-mounting `/dev/pts/$n` to `/dev/console` inside the container, an attacker can trick runc into bind-mounting paths which would normally be made read-only or be masked onto a path that the attacker can write to. This attack is very similar in concept and application to CVE-2025-31133, except that it attacks a similar vulnerability in a different target (namely, the bind-mount of `/dev/pts/$n` to `/dev/console` as configured for all containers that allocate a console). This happens after `pivot_root(2)`, so this cannot be used to write to host files directly -- however, as with CVE-2025-31133, this can load to denial of service of the host or a container breakout by providing the attacker with a writable copy of `/proc/sysrq-trigger` or `/proc/sys/kernel/core_pattern` (respectively). This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-363 Added CWE CWE-61 Added Reference https://github.com/opencontainers/runc/commit/01de9d65dc72f67b256ef03f9bfb795a2bf143b4 Added Reference https://github.com/opencontainers/runc/commit/398955bccb7f20565c224a3064d331c19e422398 Added Reference https://github.com/opencontainers/runc/commit/531ef794e4ecd628006a865ad334a048ee2b4b2e Added Reference https://github.com/opencontainers/runc/commit/9be1dbf4ac67d9840a043ebd2df5c68f36705d1d Added Reference https://github.com/opencontainers/runc/commit/aee7d3fe355dd02939d44155e308ea0052e0d53a Added Reference https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64 Added Reference https://github.com/opencontainers/runc/commit/de87203e625cd7a27141fb5f2ad00a320c69c5e8 Added Reference https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480 Added Reference https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r