CVE-2026-53133

MEDIUM

7.0

CVSS v3

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.

CWE-681

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.176-1CVE-2026-53133

Fixed in:6.12.94-1CVE-2026-53133

Fixed in:7.0.13-1CVE-2026-53133

linux-aws-7.0Ubuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-gcp-7.0Ubuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-hwe-7.0Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-7.0.0-1011-gcpUbuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-7.0.0-1011-gcp-64kUbuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-7.0.0-1012-awsUbuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-7.0.0-1012-aws-64kUbuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-7.0.0-1018-nvidiaUbuntu

Fixed in:7.0.0-1018.18~24.04.1USN-8760-1

linux-image-7.0.0-1018-nvidia-64kUbuntu

Fixed in:7.0.0-1018.18~24.04.1USN-8760-1

linux-image-7.0.0-31-genericUbuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-7.0.0-31-generic-64kUbuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-awsUbuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-aws-64kUbuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-aws-64k-7.0Ubuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-aws-7.0Ubuntu

Fixed in:7.0.0-1012.12~24.04.1USN-8726-1

linux-image-gcpUbuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-gcp-64kUbuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-gcp-64k-7.0Ubuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-gcp-7.0Ubuntu

Fixed in:7.0.0-1011.11~24.04.1USN-8728-1

linux-image-generic-64k-7.0Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-generic-64k-hwe-24.04Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-generic-7.0Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-generic-hwe-24.04Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-nvidia-64k-7.0Ubuntu

Fixed in:7.0.0-1018.18~24.04.1USN-8760-1

linux-image-nvidia-7.0Ubuntu

Fixed in:7.0.0-1018.18~24.04.1USN-8760-1

linux-image-virtual-7.0Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-image-virtual-hwe-24.04Ubuntu

Fixed in:7.0.0-31.31~24.04.1USN-8726-1

linux-nvidia-7.0Ubuntu

Fixed in:7.0.0-1018.18~24.04.1USN-8760-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Patch8

Related Vulnerabilities

Other CWE-681 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-34169	High	7.5	81%	-	Fix
CVE-2009-0231	High	8.8	37%	-	-
CVE-2016-3074	Critical	9.8	37%	-	Fix
CVE-2008-1721	High	7.5	23%	-	Fix
CVE-2017-7308	High	7.8	18%	-	Fix
CVE-2022-43663	High	8.1	14%	-	-

Common questions

How do I fix CVE-2026-53133?

Published advisories record a fix for 29 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-53133 being actively exploited?

Not that we know of. CVE-2026-53133 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.13% is the estimated probability that it will be exploited in the next 30 days. That is higher than 3% of all scored CVEs.

How severe is CVE-2026-53133?

CVE-2026-53133 has a CVSS v3 base score of 7.0, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-53133 affect?

Published advisories record a fix for linux (Debian), linux-aws-7.0 (Ubuntu), linux-gcp-7.0 (Ubuntu), linux-hwe-7.0 (Ubuntu), and 25 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-07.