Vulnerability 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.
References
- https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c
- https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3
- https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e
- https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e
- https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f
- https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068
- https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f
- https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802
FAQ
What is CVE-2026-53133?
CVE-2026-53133 is a documented vulnerability. 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 th...
How severe is CVE-2026-53133?
CVSS scoring is not yet available for CVE-2026-53133. Check NVD for updates.
Is there a patch for CVE-2026-53133?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.