RDMA/umem: Fix truncation for block sizes >= 4G_CVE-2026-53133

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix truncation for block sizes >= 4G\n\nWhen the iommu is used the linearization of the mapping can give a single\nblock that is very large split across multiple SG entries.\n\nWhen __rdma_block_iter_next() reassembles the split SG entries it is\noverflowing the 32 bit stack values and computed the wrong DMA addresses\nfor blocks after the truncation.\n\nUse the right types to hold DMA addresses.",
    "published": "2026-06-25T08:38:22.469Z",
    "modified": "2026-06-28T06:39:28.012Z",
    "type": "cve",
    "title": "RDMA/umem: Fix truncation for block sizes >= 4G",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3\nhttps://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802\nhttps://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f\nhttps://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e\nhttps://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068\nhttps://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f\nhttps://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e\nhttps://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c",
    "id": "CVE-2026-53133",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux a808273a495c657e33281b181fd7fcc2bb28f662\nLinux Linux 5.2",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
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        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "a808273a495c657e33281b181fd7fcc2bb28f662",
    "vendor": "Linux",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
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    "ai_score": 0
}