CVE-2026-43958

Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service

HIGH
7.8
CVSS Score
Published: June 1, 2026 at 05:34 PM UTC
Updated: September 28, 2026 at 04:17 AM UTC
1 product affected across 1 vendorEnterprise Linux

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 0:1.7.0-17.el8_10 (unaffected)
Vendor states this is fixed in 0:1.7.2-21.el9_2.1 (unaffected)
Vendor states this is fixed in 0:1.7.2-21.el9_4.1 (unaffected)
Vendor states this is fixed in 0:1.7.2-21.el9_6.1 (unaffected)
Vendor states this is fixed in 0:1.7.2-22.el9_8 (unaffected)
Vendor states this is fixed in 0:1.8.0-20.el10_0.1 (unaffected)
Vendor states this is fixed in 0:1.8.0-21.el10_2 (unaffected)

References (9)

VDB Entryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/security/cve/CVE-2026-43958
Issue Trackingx_refsource_REDHAT
Source: cverecord
https://bugzilla.redhat.com/show_bug.cgi?id=2460932
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:33731
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:34155
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:34156
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:68702
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:71600
Vendor Advisoryx_refsource_REDHAT
Source: cverecord
https://access.redhat.com/errata/RHSA-2026:72278

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHredhat
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-121

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