runc: container escape with malicious config due to /dev/console mount and related races

A flaw was found in runc. CVE-2025-52565 is very similar in concept and application toCVE-2025-31133, except that it exploits a flaw in /dev/console bind-mounts. When creating the /dev/console bind-mount to /dev/pts/$n, if an attacker replaces /dev/pts/$n with a symlink then runc will bind-mount...

runc: container escape via 'masked path' abuse due to mount race conditions

A flaw was found in runc. This flaw exploits an issue with how masked paths are implementedin runc. When masking files, runc will bind-mount the container's /dev/null inode on top of the file. However, if an attacker can replace /dev/null with a symlink to some other procfs file, runc will instea...

runc: opencontainers/selinux: container escape and denial of service due to arbitrary write gadgets and procfs write redirects

A flaw was found in runc. This attack is a more sophisticated variant of CVE-2019-16884, which was a flaw that allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy tmpfs file and thus not apply the correct LSM labels to the container process...

Improper Access Control

github.com/opencontainers/runc is vulnerable to improper access control. The vulnerability is due to insufficient validation when bind-mounting /dev/pts/$n to /dev/console after pivotroot, which allows an attacker to manipulate mount paths and gain writable access to sensitive locations,...

RHEL 9 : runc (RHSA-2025:19927)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2025:19927 advisory. The runC tool is a lightweight, portable implementation of the Open Container Format OCF that provides container runtime. Security Fixes:...

container escape due to /dev/console mount and related races

...

runc container escape via "masked path" abuse due to mount race conditions

...

MGASA-2025-0271 Updated opencontainers-runc packages fix security vulnerabilities

The way masked paths are implemented in runc can be exploited to cause the host system to crash or halt CVE-2025-31133 and a flaw in /dev/console bind-mounts can lead to container escape CVE-2025-52565. Also, arbitrary write gadgets and procfs write redirects could be used to engineer container...

Important: Red Hat Security Advisory: runc security update

An update for runc is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the...

runc: opencontainers/selinux: container escape and denial of service due to arbitrary write gadgets and procfs write redirects

A flaw was found in runc. This attack is a more sophisticated variant of CVE-2019-16884, which was a flaw that allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy tmpfs file and thus not apply the correct LSM labels to the container process...

runc: container escape with malicious config due to /dev/console mount and related races

A flaw was found in runc. CVE-2025-52565 is very similar in concept and application toCVE-2025-31133, except that it exploits a flaw in /dev/console bind-mounts. When creating the /dev/console bind-mount to /dev/pts/$n, if an attacker replaces /dev/pts/$n with a symlink then runc will bind-mount...

runc: container escape via 'masked path' abuse due to mount race conditions

A flaw was found in runc. This flaw exploits an issue with how masked paths are implementedin runc. When masking files, runc will bind-mount the container's /dev/null inode on top of the file. However, if an attacker can replace /dev/null with a symlink to some other procfs file, runc will instea...

CVE-2025-62161

Youki is a container runtime written in Rust. In versions 0.5.6 and below, the initial validation of the source /dev/null is insufficient, allowing container escape when youki utilizes bind mounting the container's /dev/null as a file mask. This issue is fixed in version 0.5.7...

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : runc (SUSE-SU-2025:3950-1)

The remote SUSE Linux SLED15 / SLEDSAP15 / SLES15 / SLESSAP15 / openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:3950-1 advisory. - CVE-2025-31133: Fixed container escape via 'masked path' abuse due to mount race conditions...

Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 : runC vulnerabilities (USN-7851-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 / 25.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7851-1 advisory. Lei Wang and Li Fubang discovered that runC incorrectly handled masked paths. An attacker could possibly replace a container'...

Important: runc security update

The runC tool is a lightweight, portable implementation of the Open Container Format OCF that provides container runtime. Security Fixes: runc: container escape via 'masked path' abuse due to mount race conditions CVE-2025-31133 runc: container escape with malicious config due to /dev/console mou...

SUSE SLES12 Security Update : runc (SUSE-SU-2025:3951-1)

The remote SUSE Linux SLES12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:3951-1 advisory. - CVE-2025-31133: Fixed container escape via 'masked path' abuse due to mount race conditions bsc1252232. - CVE-2025-52565: Fixed container...

ALSA-2025:19927 Important: runc security update

The runC tool is a lightweight, portable implementation of the Open Container Format OCF that provides container runtime. Security Fixes: runc: container escape via 'masked path' abuse due to mount race conditions CVE-2025-31133 runc: container escape with malicious config due to /dev/console mou...

EUVD-2025-37940

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts we have also verified thi...

CVE-2025-52565 container escape due to /dev/console mount and related races

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...