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Vulnerability · Published Jun 1, 2026 · Assigned by redhat

CVE-2026-43958Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service

High 7.8

In plain English

A high-severity stack buffer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 92.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10python3-rrdtool1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8python3-rrdtool1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9python3-rrdtool1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-devel1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-devel1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-devel1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-doc1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-doc1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-doc1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-lua1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-lua1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-lua1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-perl1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-perl1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-perl1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-ruby1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-ruby1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-ruby1.7.2-22.el9_8ALSA-2026:34156
AlmaLinux:10rrdtool-tcl1.8.0-21.el10_2ALSA-2026:33731
AlmaLinux:8rrdtool-tcl1.7.0-17.el8_10ALSA-2026:34155
AlmaLinux:9rrdtool-tcl1.7.2-22.el9_8ALSA-2026:34156
Debian:12rrdtoolno fix listedDEBIAN-CVE-2026-43958
Debian:13rrdtoolno fix listedDEBIAN-CVE-2026-43958
Debian:14rrdtoolno fix listedDEBIAN-CVE-2026-43958
Rocky Linux:10rrdtool0:1.8.0-21.el10_2RLSA-2026:33731
Rocky Linux:8rrdtool0:1.7.0-17.el8_10RLSA-2026:34155
Rocky Linux:9rrdtool0:1.7.2-22.el9_8RLSA-2026:34156
Ubuntu:22.04:LTSrrdtoolno fix listedUBUNTU-CVE-2026-43958
Ubuntu:24.04:LTSrrdtoolno fix listedUBUNTU-CVE-2026-43958
Ubuntu:25.10rrdtoolno fix listedUBUNTU-CVE-2026-43958
Ubuntu:26.04:LTSrrdtoolno fix listedUBUNTU-CVE-2026-43958

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references

Weakness: CWE-121 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References