Trending
CVE-2026-53133

CVE detail

CVE-2026-53133

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 7.8 · HighBuzz score 33.0

Buzz score

Why this CVE is surfacing

Buzz score total 33.0

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 23.0 · diversity 10.0 · KEV 0.0 · OTX 0.0 · PoC 0.0

Mention score

23.0

9 evidence mentions in the snapshot

Diversity score

10.0

2 sources across 2 categories

KEV score

0.0

No KEV entry observed

OTX score

0.0

0 OTX pulses

PoC score

0.0

0 repos · best confidence N/A

Best PoC traction

Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions: 0; within the 30d window
Peak daily: 0; highest bucket

Evidence

Source links by recency

Newest mentions first

9 source links · newest first

CVE-2026-53133 RDMA/umem: Fix truncation for block sizes >= 4GMicrosoft MSRC
Information published.
vendormsrc.microsoft.comJun 28, 2026, 8:51 AM
https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802git.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0fgit.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068git.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24fgit.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469egit.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6egit.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3git.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM
https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746cgit.kernel.org
No excerpt available.
Patchgit.kernel.orgJun 25, 2026, 9:16 AM

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars

No public PoC repositories have been matched yet.

Related records

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External lookup

Potential internet exposure

Potential exposure only — not proof of vulnerability.Shodan results indicate potentially internet-exposed products, not confirmed vulnerable systems. They do not confirm that any returned system is vulnerable to CVE-2026-53133.

Product-level CPE searches intentionally omit version fields and NVD version-range or configuration certainty. Verify the exact product version and configuration independently.

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Product CPE queries

Derived from this CVE's existing NVD CPE 2.3 records; the application, operating-system, or hardware part is retained.

cpe:2.3:o:linux:linux_kernelSearch this product on Shodan

Exact CVE query

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Metadata

Canonical fields

NVD status

Analyzed

Published

Jun 25, 2026

Modified

Jul 7, 2026

Official record

Authoritative NVD record

CVSS vector

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

CWE IDs

Vendor classifications

How this vector reads

CVSS 3.1 base metrics decoded below. This explanation does not recalculate or change the NVD score.

Attack Vector (AV): Local. The attacker needs local access to the vulnerable system.
Attack Complexity (AC): Low. No special conditions beyond the attacker-controlled steps are required.
Privileges Required (PR): Low. The attacker needs basic user-level privileges.
User Interaction (UI): None. Exploitation does not require another user to act.
Scope (S): Unchanged. Impacts remain within the vulnerable security authority.
Confidentiality Impact (C): High. There is a total or serious impact to this security property.
Integrity Impact (I): High. There is a total or serious impact to this security property.
Availability Impact (A): High. There is a total or serious impact to this security property.

Signals

Exploitation indicators

0 stored signals · no KEV · 0 OTX pulses