CVE-2026-58224

Service interruption and memory disclosure via malformed packets

Published Aug 14, 2026 · Updated Aug 14, 2026

Improper packet validation in Samba CTDB on Red Hat Enterprise Linux 7 allows attackers to crash CTDB or disclose adjacent memory. CTDB unmarshalling and protocol handlers accept field lengths beyond packet bounds, edge-case NUL termination, and inconsistent overall packet sizes. Most paths require access to the unauthenticated, isolated CTDB private network; event-protocol paths require local Unix-socket access, and oversized packets can exhaust memory.

CVSS severity6.5
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

Improper packet validation in Samba CTDB on Red Hat Enterprise Linux 7 allows attackers to crash CTDB or disclose adjacent memory. CTDB unmarshalling and protocol handlers accept field lengths beyond packet bounds, edge-case NUL termination, and inconsistent overall packet sizes. Most paths require access to the unauthenticated, isolated CTDB private network; event-protocol paths require local Unix-socket access, and oversized packets can exhaust memory.

The record

CVE
CVE-2026-58224
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 7
Classifications
CWE-353, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.

Published CVSS scores

7.1Samba TeamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
6.5Red HatCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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

No observations available

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

Weakness, pattern, technique

CWE-353Missing Support for Integrity Check
T1499.004Application or System Exploitation

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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