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Vulnerability record · CVE-2026-53133 · published 25 June 2026

CVE-2026-53133: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.9% CWE-681 · CWE-681
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
7 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c Patch
https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3 Patch
https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e Patch
https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e Patch
https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f Patch
https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068 Patch
https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f Patch
https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-53133), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.