{"id":"CVE-2026-53133","summary":"RDMA/umem: Fix truncation for block sizes \u003e= 4G","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix truncation for block sizes \u003e= 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.","modified":"2026-07-11T09:29:26.827289829Z","published":"2026-06-25T08:38:22.469Z","related":["CGA-rvw7-3hmf-j63q","SUSE-SU-2026:22521-1","SUSE-SU-2026:22522-1","SUSE-SU-2026:2799-1","SUSE-SU-2026:2800-1","SUSE-SU-2026:2840-1","SUSE-SU-2026:2841-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53133.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53133.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53133"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a808273a495c657e33281b181fd7fcc2bb28f662"},{"fixed":"2ff4b7817e5b78070c30f5fb5e678e452a2628b3"},{"fixed":"dee2a49adeeb2a5e16a3fc858fa21b841c519802"},{"fixed":"cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f"},{"fixed":"8fe0231adebe086c8a459c790944ac026cd99c6e"},{"fixed":"baf8685bcf56dc1efb44b8f6a57c42516e549068"},{"fixed":"afd35fec9297195b759078745549c2671223f24f"},{"fixed":"ac1aad8e1281534ce936c250f68084fc79c5469e"},{"fixed":"15fe76e23615f502d051ef0768f86babaf08746c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53133.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.2.0"},{"fixed":"5.10.259"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.210"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.176"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.143"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.94"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.36"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.13"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53133.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}