CVE-2026-53133
RDMA/umem: Fix truncation for block sizes >= 4G
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Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3
- https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802
- https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f
- https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e
- https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068
References (8)
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