opencontainers runc Config File /dev/console access control

Summaryinfo

A vulnerability was found in opencontainers runc and classified as critical. This affects an unknown function of the file /dev/console of the component Config File Handler. Such manipulation leads to access control. This vulnerability is listed as CVE-2025-52565. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in opencontainers runc (the affected version is unknown). Affected by this issue is an unknown code of the file /dev/console of the component Config File Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at bugzilla.redhat.com. This vulnerability is handled as CVE-2025-52565. The exploitation is known to be easy. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/02/2026). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 274068 (Fedora 44 : runc (2025-6a0f63aaab)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (274068), EUVD (EUVD-2025-37944) and CERT Bund (WID-SEC-2025-2518). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

• Google Container-Optimized OS
• Google Cloud Platform
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Red Hat OpenShift
• Docker Desktop
• Dell NetWorker

Productinfo

Type

• Virtualization Software

Vendor

• opencontainers

Name

• runc

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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