CVE-2026-59143

Memory disclosure and crash via unvalidated bucket metadata

Published Jul 21, 2026 · Updated Jul 21, 2026

Out-of-bounds read in Data::RoaringBitmap::Shared before 0.02 allows local users to read adjacent memory or crash a process. The rb_contains_locked routine derives a container pointer from an unchecked file-stored offset and scans it using an unchecked file-stored cardinality. Exploitation requires a local peer able to modify the backing file; a poisoned bucket is reached when the process performs a membership query.

CVSS severity6.3
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Data::RoaringBitmap::Shared before 0.02 allows local users to read adjacent memory or crash a process. The rb_contains_locked routine derives a container pointer from an unchecked file-stored offset and scans it using an unchecked file-stored cardinality. Exploitation requires a local peer able to modify the backing file; a poisoned bucket is reached when the process performs a membership query.

The record

CVE
CVE-2026-59143
Published
Jul 21, 2026
Updated
Jul 21, 2026
Vendor
Yegor Korablev
Product
Data::RoaringBitmap::Shared
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=0 <0.02

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Yegor Korablev · Data::RoaringBitmap::Sharedversion=0 <0.02

Published CVSS scores

6.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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