CVE-2026-43958Public exploit

Local code execution via unbounded CREATE arguments

Published Jun 1, 2026 · Updated Jun 1, 2026

Stack-based buffer overflow in rrdcached on Red Hat Enterprise Linux allows local users to execute code or crash the daemon via CREATE requests. The handle_request_create() routine accepts unbounded DS and RRA arguments from a CREATE request, overflowing stack storage during request processing. Exploitation requires permission to access the local UNIX socket by default; code runs in the daemon context, while unsuccessful attempts interrupt the service.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in rrdcached on Red Hat Enterprise Linux allows local users to execute code or crash the daemon via CREATE requests. The handle_request_create() routine accepts unbounded DS and RRA arguments from a CREATE request, overflowing stack storage during request processing. Exploitation requires permission to access the local UNIX socket by default; code runs in the daemon context, while unsuccessful attempts interrupt the service.

The record

CVE
CVE-2026-43958
Published
Jun 1, 2026
Updated
Jun 1, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 6
Classifications
CWE-121
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 1, 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 vectorlocal
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 6Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

7.8Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

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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