CVE-2026-53133High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Fix truncation for block sizes >= 4G When the iommu is used the linearization of the mapping can give a single block that is very large split across multipl…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
RDMA/umem: Fix truncation for block sizes >= 4G
When the iommu is used the linearization of the mapping can give a single block that is very large split across multiple SG entries.
When __rdma_block_iter_next() reassembles the split SG entries it is overflowing the 32 bit stack values and computed the wrong DMA addresses for blocks after the truncation.
Use the right types to hold DMA addresses.
Linux >= a808273a495c657e33281b181fd7fcc2bb28f662 < 2ff4b7817e5b78070c30f5fb5e678e452a2628b3Linux >= a808273a495c657e33281b181fd7fcc2bb28f662 < dee2a49adeeb2a5e16a3fc858fa21b841c519802Linux >= a808273a495c657e33281b181fd7fcc2bb28f662 < cc644d5608e3b0dadc970bd6e6aa26b91ea07d0fLinux >= a808273a495c657e33281b181fd7fcc2bb28f662 < 8fe0231adebe086c8a459c790944ac026cd99c6eLinux >= a808273a495c657e33281b181fd7fcc2bb28f662 < baf8685bcf56dc1efb44b8f6a57c42516e549068Linux >= a808273a495c657e33281b181fd7fcc2bb28f662 < afd35fec9297195b759078745549c2671223f24fLinux >= a808273a495c657e33281b181fd7fcc2bb28f662 < ac1aad8e1281534ce936c250f68084fc79c5469eLinux >= a808273a495c657e33281b181fd7fcc2bb28f662 < 15fe76e23615f502d051ef0768f86babaf08746cLinux 5.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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