CVE-2024-56712

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Esto deja un dma_buf en la memoria que contiene un puntero colgante; aunque eso no parece conducir a nada malo excepto a una p\u00e9rdida de memoria. Arr\u00e9glelo moviendo la llamada dma_buf_fd() fuera de export_udmabuf() para que podamos darle un gesti\u00f3n de errores diferente. Tenga en cuenta que la forma de este c\u00f3digo cambi\u00f3 mucho en el commit 5e72b2b41a21 (\"udmabuf: convertir el controlador udmabuf para usar folios\"); Pero la p\u00e9rdida de memoria parece haber existido desde la introducci\u00f3n de udmabuf."}], "id": "CVE-2024-56712", "lastModified": "2026-10-30T13:17:48.370", "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"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "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:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-56712", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-04-17T20:10:27.510565Z", "version": "2.0.3"}}]}, "published": "2024-12-29T09:15:06.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/00ebdef47994206f60546929a0f6f63285497272"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9fc8428d4255c2128da9c4d5cd92e554d0150cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e469922fbdf6ad729e5dc8d49289b5036a0ecdf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f49856f525acd5bef52ae28b7da2e001bbe7439e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-401"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: udmabuf: fix memory leak on last export_udmabuf() error path", "id": "2334788", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2334788"}, "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-401", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nudmabuf: fix memory leak on last export_udmabuf() error path\nIn export_udmabuf(), if dma_buf_fd() fails because the FD table is full, a\ndma_buf owning the udmabuf has already been created; but the error handling\nin udmabuf_create() will tear down the udmabuf without doing anything about\nthe containing dma_buf.\nThis leaves a dma_buf in memory that contains a dangling pointer; though\nthat doesn't seem to lead to anything bad except a memory leak.\nFix it by moving the dma_buf_fd() call out of export_udmabuf() so that we\ncan give it different error handling.\nNote that the shape of this code changed a lot in commit 5e72b2b41a21\n(\"udmabuf: convert udmabuf driver to use folios\"); but the memory leak\nseems to have existed since the introduction of udmabuf."], "name": "CVE-2024-56712", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-56712\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-56712\nhttps://lore.kernel.org/linux-cve-announce/2024122914-CVE-2024-56712-d62a@gregkh/T"], "threat_severity": "Low"}

{}