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rrdcached CVE-2026-43958

| EUVD-2026-33726 HIGH
Stack-based Buffer Overflow (CWE-121)
2026-06-01 redhat GHSA-pgh2-hfvj-4q69
7.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jun 01, 2026 - 19:23 vuln.today
CVE Published
Jun 01, 2026 - 17:34 nvd
HIGH 7.8

DescriptionNVD

A flaw was found in rrdcached, a component of rrdtool. A local attacker with access to a rrdcached socket can exploit a stack-based buffer overflow by sending an oversized CREATE request. This vulnerability can lead to a denial of service by crashing the daemon or potentially allow for arbitrary code execution, impacting the integrity and confidentiality of data.

AnalysisAI

Stack-based buffer overflow in rrdcached (the caching daemon for rrdtool) allows a local attacker with socket access to crash the daemon or potentially execute arbitrary code by sending an oversized CREATE request. The flaw is tracked under CWE-121 with a CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:L), reported by Red Hat against RHEL 6 through 10, and there is no public exploit identified at time of analysis.

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RemediationAI

Within 24 hours: Identify all systems running rrdcached (focus on RHEL 6, 7, 8, 9, 10), document current socket file permissions and local user accounts with access, and review audit logs for suspicious local access attempts. Within 7 days: Implement file-level access controls (restrict socket to authorized users only), enforce SELinux policies limiting rrdcached privileges, enable monitoring of rrdcached process behavior and logs, and restrict local system access to trusted administrators. …

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Vendor StatusVendor

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CVE-2026-43958 vulnerability details – vuln.today

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