CVE-2026-43958: Red Hat Enterprise Linux 10

High severity, CVSS 7.8. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• Red Hat Red Hat Enterprise Linux 10: before 0:1.8.0-21.el10_2 (fixed in 0:1.8.0-21.el10_2)
• Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: before 0:1.8.0-20.el10_0.1 (fixed in 0:1.8.0-20.el10_0.1)
• Red Hat Red Hat Enterprise Linux 6
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8: before 0:1.7.0-17.el8_10 (fixed in 0:1.7.0-17.el8_10)
• Red Hat Red Hat Enterprise Linux 9: before 0:1.7.2-22.el9_8 (fixed in 0:1.7.2-22.el9_8)
• Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions: before 0:1.7.2-21.el9_2.1 (fixed in 0:1.7.2-21.el9_2.1)
• Red Hat Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions: before 0:1.7.2-21.el9_4.1 (fixed in 0:1.7.2-21.el9_4.1)
• Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: before 0:1.7.2-21.el9_6.1 (fixed in 0:1.7.2-21.el9_6.1)

Published 2026-06-01. Last modified 2026-09-28.