CVE-2026-88839

Heap corruption via stale tokenize endpoint

Published Sep 23, 2026 · Updated Sep 23, 2026

Out-of-bounds write in BusyBox account parsing in Red Hat Hardened Images allows attackers to corrupt heap memory via crafted records. The tokenize() routine retains a stale endpoint after trimming, so group-member pointer placement can extend beyond the allocated buffer. Exploitation requires influence over a parsed passwd or group record; no code-execution or service-level consequence is publicly established.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in BusyBox account parsing in Red Hat Hardened Images allows attackers to corrupt heap memory via crafted records. The tokenize() routine retains a stale endpoint after trimming, so group-member pointer placement can extend beyond the allocated buffer. Exploitation requires influence over a parsed passwd or group record; no code-execution or service-level consequence is publicly established.

The record

CVE
CVE-2026-88839
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Commonhaus Foundation
Product
Red Hat Hardened Images
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Commonhaus Foundation · Red Hat Hardened ImagesAffected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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