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Dado que el intento de asignaci\u00f3n actual fall\u00f3, esta desasignaci\u00f3n est\u00e1 eliminando alguna asignaci\u00f3n DMA aleatoria que a\u00fan podr\u00eda ser necesaria. Si la funci\u00f3n PCI ahora presenta ese IOVA, el IOMMU puede asumir un acceso DMA no autorizado y, por ejemplo, en s390 pone la funci\u00f3n PCI en estado de error. El comportamiento err\u00f3neo se observ\u00f3 en un entorno de prueba de estr\u00e9s que cre\u00f3 presi\u00f3n de memoria."}], "id": "CVE-2024-50001", "lastModified": "2025-11-03T23:16:39.137", "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"}]}, "published": "2024-10-21T18:15:20.130", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/26fad69b34fcba80d5c7d9e651f628e6ac927754"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2bcae12c795f32ddfbf8c80d1b5f1d3286341c32"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8bb8c12fb5e2b1f03d603d493c92941676f109b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca36d6c1a49b6965c86dd528a73f38bc62d9c625"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ce828b347cf1b3c1b12b091d02463c35ce5097f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ecf310aaf256acbc8182189fe0aa1021c3ddef72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fc357e78176945ca7bcacf92ab794b9ccd41b4f4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/mlx5: Fix error path in multi-packet WQE transmit", "id": "2320568", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320568"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-755", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/mlx5: Fix error path in multi-packet WQE transmit\nRemove the erroneous unmap in case no DMA mapping was established\nThe multi-packet WQE transmit code attempts to obtain a DMA mapping for\nthe skb. This could fail, e.g. under memory pressure, when the IOMMU\ndriver just can't allocate more memory for page tables. While the code\ntries to handle this in the path below the err_unmap label it erroneously\nunmaps one entry from the sq's FIFO list of active mappings. Since the\ncurrent map attempt failed this unmap is removing some random DMA mapping\nthat might still be required. If the PCI function now presents that IOVA,\nthe IOMMU may assumes a rogue DMA access and e.g. on s390 puts the PCI\nfunction in error state.\nThe erroneous behavior was seen in a stress-test environment that created\nmemory pressure."], "name": "CVE-2024-50001", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "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": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50001\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50001\nhttps://lore.kernel.org/linux-cve-announce/2024102139-CVE-2024-50001-67e4@gregkh/T"], "threat_severity": "Low"}