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{"cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2025-52565", "lastModified": "2025-11-06T20:15:49.240", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2025-11-06T20:15:49.240", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/01de9d65dc72f67b256ef03f9bfb795a2bf143b4"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/398955bccb7f20565c224a3064d331c19e422398"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/531ef794e4ecd628006a865ad334a048ee2b4b2e"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/9be1dbf4ac67d9840a043ebd2df5c68f36705d1d"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/aee7d3fe355dd02939d44155e308ea0052e0d53a"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/de87203e625cd7a27141fb5f2ad00a320c69c5e8"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480"}, {"source": "security-advisories@github.com", "url": "https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-61"}, {"lang": "en", "value": "CWE-363"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{"bugzilla": {"description": "runc: container escape with malicious config due to /dev/console mount and related races", "id": "2404708", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2404708"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-59", "details": ["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\nbind-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 the symlink target over /dev/console."], "mitigation": {"lang": "en:us", "value": "Potential mitigations for this issue include:\n* Using user namespaces, with the host root user not mapped into the container's namespace. procfs file permissions are managed using Unix DAC and thus user namespaces stop a container process from being able to write to them.\n* Not running as a root user in the container (this includes disabling setuid binaries with noNewPrivileges). As above, procfs file permissions are managed using Unix DAC and thus non-root users cannot write to them.\n* The default SELinux policy should mitigate this issue, as the /dev/console bind-mount does not re-label the mount and so the container process should not be able to write to unsafe procfs files. However, CVE-2025-52881 allows an attacker to bypass LSM labels, and so this mitigation is not helpful when considered in combination with CVE-2025-52881.\n* The default AppArmor profile used by most runtimes will NOT help mitigate this issue, as /dev/console access is permitted. You could create a custom profile that blocks access to /dev/console, but such a profile might break regular containers. In addition, CVE-2025-52881 allows an attacker to bypass LSM labels, and so that mitigation is not helpful when considered in combination with CVE-2025-52881."}, "name": "CVE-2025-52565", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "container-tools:rhel8/runc", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "runc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "runc", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2025-11-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-52565\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-52565"], "statement": "Red Hat considers this as an Important flaw since the impact is limited to local attack with minimal privileges in order to jeopardize the environment.", "threat_severity": "Important"}

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