CVE-2024-40938

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This cannot work in practice because\nthis directory is mounted, but the VFS check is done after the call to\nsecurity_path_link().\n\nDo not use source directory's d_parent when the source directory is the\nmount point.\n\n[mic: Fix commit message]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: landlock: Fix d_parent walk WARN_ON_ONCE() en Collect_domain_accesses() se puede activar al intentar vincular un punto de montaje ra\u00edz. Esto no puede funcionar en la pr\u00e1ctica porque este directorio est\u00e1 montado, pero la verificaci\u00f3n de VFS se realiza despu\u00e9s de llamar a security_path_link(). No utilice d_parent del directorio de origen cuando el directorio de origen sea el punto de montaje. [micr\u00f3fono: Arreglar mensaje de confirmaci\u00f3n]"}], "id": "CVE-2024-40938", "lastModified": "2026-06-17T07:46:54.663", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-40938", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T17:04:36.699030Z", "version": "2.0.3"}}]}, "published": "2024-07-12T13:15:16.247", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88da52ccd66e65f2e63a6c35c9dff55d448ef4dc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6e5e696435832b33e40775f060ef5c95f4fda1f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c7618c7b0b8c45bcef34410cc1d1e953eb17f8f6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cc30d05b34f9a087a6928d09b131f7b491e9ab11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: landlock: Fix d_parent walk", "id": "2297522", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2297522"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nlandlock: Fix d_parent walk\nThe WARN_ON_ONCE() in collect_domain_accesses() can be triggered when\ntrying to link a root mount point. This cannot work in practice because\nthis directory is mounted, but the VFS check is done after the call to\nsecurity_path_link().\nDo not use source directory's d_parent when the source directory is the\nmount point.\n[mic: Fix commit message]", "A vulnerability was found in the Linux kernel's Landlock security module. This issue could trigger a `WARN_ON_ONCE()` when trying to link a root mount point, as the VFS check was incorrectly done after `security_path_link()`. This issue was resolved by fixing the `d_parent` walk in `collect_domain_accesses()`."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-40938", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-07-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-40938\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-40938\nhttps://lore.kernel.org/linux-cve-announce/2024071218-CVE-2024-40938-1619@gregkh/T"], "statement": "Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.", "threat_severity": "Moderate"}

{"created": "2025-07-12T23:06:12.901554+00:00", "updated": "2025-07-12T23:06:12.901647+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}