CVE-2025-52881

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{"name": "https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557", "tags": ["x_refsource_MISC"], "url": "https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557"}, {"name": "https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md", "tags": ["x_refsource_MISC"], "url": "https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md"}, {"name": "http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322", "tags": ["x_refsource_MISC"], "url": "http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"}, {"name": "http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3", "tags": ["x_refsource_MISC"], "url": "http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"}], "affected": [{"vendor": "opencontainers", "product": "runc", "versions": [{"version": "<= 1.2.7, < 1.2.8", "status": "affected"}, 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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 this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3."}], "source": {"advisory": "GHSA-cgrx-mc8f-2prm", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-11-06T21:06:59.235416Z", "id": "CVE-2025-52881", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-11-06T21:07:09.382Z"}}]}}

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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 this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. This issue is fixed in versions 1.2.8, 1.3.3, and 1.4.0-rc.3."}, {"lang": "es", "value": "runc es una herramienta CLI para generar y ejecutar contenedores seg\u00fan la especificaci\u00f3n OCI. En las versiones 1.2.7, 1.3.2 y 1.4.0-rc.2, un atacante puede enga\u00f1ar a runc para que redirija incorrectamente las escrituras a /proc a otros archivos procfs mediante el uso de un contenedor en carrera con montajes compartidos (tambi\u00e9n hemos verificado que este ataque es posible de explotar utilizando un Dockerfile est\u00e1ndar con docker buildx build, ya que eso tambi\u00e9n permite activar la ejecuci\u00f3n paralela de contenedores con montajes compartidos personalizados configurados). Esta redirecci\u00f3n podr\u00eda ser a trav\u00e9s de enlaces simb\u00f3licos en un tmpfs o te\u00f3ricamente otros m\u00e9todos como montajes de enlace (bind-mounts) regulares. Aunque similar, la mitigaci\u00f3n aplicada para el CVE relacionado, CVE-2019-19921, fue bastante limitada y efectivamente solo hizo que runc verificara que cuando se escriben etiquetas LSM, estas son realmente archivos procfs. Este problema est\u00e1 solucionado en las versiones 1.2.8, 1.3.3 y 1.4.0-rc.3."}], "id": "CVE-2025-52881", "lastModified": "2026-10-07T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", 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"vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-52881", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-11-06T21:06:59.235416Z", "version": "2.0.3"}}]}, "published": "2025-11-06T21:15:42.817", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": 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{"bugzilla": {"description": "runc: opencontainers/selinux: container escape and denial of service due to arbitrary write gadgets and procfs write redirects", "id": "2404715", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2404715"}, "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. 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. The mitigation applied for CVE-2019-16884 was fairly limited and effectively only caused runc to verify that when we write LSM labels that those labels are actual procfs files."], "mitigation": {"lang": "en:us", "value": "Potential mitigations for this issue include:\n* Using rootless containers, as doing so will block most of the inadvertent writes (runc would run with reduced privileges, making attempts to write to procfs files ineffective).\n* Based on our analysis, neither AppArmor or SELinux can protect against the full version of the redirected write attack. The container runtime is generally privileged enough to write to arbitrary procfs files, which is more than sufficient to cause a container breakout."}, "name": "CVE-2025-52881", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "buildah", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "podman", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/buildah", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/podman", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rhel10/skopeo", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "skopeo", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "ubi10/buildah", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "ubi10/podman", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "ubi10/skopeo", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "container-tools:rhel8/podman", "product_name": "Red Hat Enterprise Linux 8"}, {"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:8", "fix_state": "Affected", "package_name": "container-tools:rhel8/skopeo", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rhel9/buildah", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rhel9/rhel-bootc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rhel9/skopeo", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "runc", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "ubi9/buildah", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "ubi9/skopeo", "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": "2025-11-05T09:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-52881\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-52881"], "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"}

{"created": "2025-11-07T10:53:55.756887+00:00", "updated": "2025-11-07T10:53:55.756915+00:00", "vendors": ["opencontainers", "opencontainers$PRODUCT$runc"]}