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CVE-2026-103634

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

CVSS score

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EPSS probability

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Risk score

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Published

4 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Apache DataSketches C++ Count-Min Sketch Deserialization Memory Corruption Vulnerability

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

An out-of-bounds read and write vulnerability in the count_min_sketch::deserialize function of Apache DataSketches C++ can cause memory corruption and crashes. This issue affects applications that deserialize sketches from untrusted sources.

Why does it matter?

Applications processing data from untrusted sources remain exposed to memory corruption and potential exploitation risks.

What should be done?

  • Follow vendor advisories and updates
  • Update applications processing untrusted inputs
Chain of evidence and sources2 verified claims

count_min_sketch::deserialize fonksiyonu giriş boyutu kontrolüne ön bilgiyi dahil etmemektedir.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

Tablo boyutu, 32-bit aritmetik kullanılarak seri hale getirilmiş kova ve hash fonksiyonu sayısından hesaplanmaktadır.

S0 · daybreach-canonicalS1 · cvelistS2 · nvd
Show the technical text from the sources

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.

CWE: CWE-787, CWE-190

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-103634 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1Apache Software FoundationApache DataSketches View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
The sources have not yet published a verified CVSS metric.

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

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Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-103634 is associated with the following CWEs:

CWE-787: Out-of-bounds WriteCWE-190: Integer Overflow or Wraparound

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-2026-103634 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Official Sources and Advisories

https://lists.apache.org/thread/rkx9oh06g5cjc6vmmpqloxwfz0gzz01hvendor-advisoryhttps://github.com/apache/datasketches-cpp/releases/tag/5.3.0vendor-advisoryhttp://www.openwall.com/lists/oss-security/2026/10/10/4nvd

Yama durumu bilinmiyor

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Weakness Type (CWE & CAPEC)

CWE-787 CWE-190

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CVE-2026-103634 · Apache DataSketches: datasketches-cpp:…