CVE-2026-53133
RDMA/umem: Fix truncation for block sizes >= 4G
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.
INFO
Published Date :
June 25, 2026, 9:16 a.m.
Last Modified :
July 7, 2026, 5:02 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Update the Linux kernel to the patched version.
- Ensure correct data types are used for DMA addresses.
- Verify memory handling in RDMA block iteration.
- Test system stability after the update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53133.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53133 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53133
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53133 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53133 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Jul. 07, 2026
Action Type Old Value New Value Added CWE CWE-681 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.176 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.143 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.210 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.36 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.94 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.13 *cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.2 up to (excluding) 5.10.259 *cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 28, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': '2ff4b7817e5b78070c30f5fb5e678e452a2628b3', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': 'dee2a49adeeb2a5e16a3fc858fa21b841c519802', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': 'cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': '8fe0231adebe086c8a459c790944ac026cd99c6e', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': 'baf8685bcf56dc1efb44b8f6a57c42516e549068', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': 'afd35fec9297195b759078745549c2671223f24f', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': 'ac1aad8e1281534ce936c250f68084fc79c5469e', 'versionType': 'git'}, {'status': 'affected', 'version': 'a808273a495c657e33281b181fd7fcc2bb28f662', 'lessThan': '15fe76e23615f502d051ef0768f86babaf08746c', 'versionType': 'git'}], 'programFiles': ['drivers/infiniband/core/iter.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.2'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.2', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.259', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.210', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.176', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.143', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.94', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.36', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.13', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/infiniband/core/iter.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/15fe76e23615f502d051ef0768f86babaf08746c Added Reference https://git.kernel.org/stable/c/2ff4b7817e5b78070c30f5fb5e678e452a2628b3 Added Reference https://git.kernel.org/stable/c/8fe0231adebe086c8a459c790944ac026cd99c6e Added Reference https://git.kernel.org/stable/c/ac1aad8e1281534ce936c250f68084fc79c5469e Added Reference https://git.kernel.org/stable/c/afd35fec9297195b759078745549c2671223f24f Added Reference https://git.kernel.org/stable/c/baf8685bcf56dc1efb44b8f6a57c42516e549068 Added Reference https://git.kernel.org/stable/c/cc644d5608e3b0dadc970bd6e6aa26b91ea07d0f Added Reference https://git.kernel.org/stable/c/dee2a49adeeb2a5e16a3fc858fa21b841c519802