CVE-2026-103634

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Source

https://cve.org/CVERecord?id=CVE-2026-103634

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103634.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-103634

Published

2026-10-22T06:42:20Z

Modified

2026-10-23T02:45:13Z

Summary

Apache DataSketches: datasketches-cpp: Out-of-bounds read and write in Count-Min sketch deserialization allows memory corruption via a crafted sketch

Details

Out-of-bounds read and write in the Count-Min sketch deserialization of Apache DataSketches C++ (repo: datasketches-cpp).

count_min_sketch::deserialize() did not include the preamble in its input size check, so a truncated sketch could cause a read of up to 16 bytes past the end of the input. In addition, the table size was computed from the serialized number of buckets and number of hash functions in 32-bit arithmetic. A crafted sketch could make it wrap to zero, so that the sketch deserialized with an empty table, and later updates and estimate queries read and wrote outside the heap allocation. This can corrupt heap memory, causing a crash and potentially enabling further exploitation.

This issue affects Apache DataSketches C++: from 4.1.0 before 5.3.0. Only applications that deserialize Count-Min sketches from untrusted sources are affected.

Users are recommended to upgrade to version 5.3.0, which fixes this issue.

Database specific

{
    "cna_assigner":  "apache",
    "cwe_ids":  [
        "CWE-190",
        "CWE-787"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103634.json"
}

References

Affected packages

Git / github.com/apache/datasketches-cpp

Affected ranges

Type

GIT

Repo

https://github.com/apache/datasketches-cpp

Events

Introduced

c3abaaefe5fa400eed99e082af07c1b61a7144db

Last Affected

de8553ba372e618382c2e7b44b0ffc9422b9458c

Fixed

5b5524f55d121225a7909c2851271327684585d7

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "4.1.0"
                },
                {
                    "last_affected":  "5.2.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "original_tag":  "5.3.0",
            "range":  [
                {
                    "fixed":  "5b5524f55d121225a7909c2851271327684585d7"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103634.json"