CVE-2026-10649: Red Hat Enterprise Linux 10

High severity, CVSS 8.6. EPSS: 0.6% chance of exploitation in the next 30 days.

A flaw was found in Pacemaker. An unauthenticated remote attacker can exploit an integer overflow vulnerability in the remote message decompression process. By sending a specially crafted compressed remote message before authentication, an attacker can cause memory corruption, leading to a denial of service (DoS) in the CIB remote listener. This can result in the affected service crashing.

Affected products

  • Red Hat Red Hat Enterprise Linux 10: before 0:3.0.1-5.el10_2.1 (fixed in 0:3.0.1-5.el10_2.1)
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support: before 0:3.0.0-5.3.el10_0 (fixed in 0:3.0.0-5.3.el10_0)
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support: before 0:1.1.23-1.el7_9.2 (fixed in 0:1.1.23-1.el7_9.2)
  • Red Hat Red Hat Enterprise Linux 8: before 0:2.1.7-5.6.el8_10 (fixed in 0:2.1.7-5.6.el8_10)
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: before 0:2.0.5-9.el8_4.12 (fixed in 0:2.0.5-9.el8_4.12)
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: before 0:2.0.5-9.el8_4.12 (fixed in 0:2.0.5-9.el8_4.12)
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: before 0:2.1.2-4.el8_6.11 (fixed in 0:2.1.2-4.el8_6.11)
  • Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: before 0:2.1.2-4.el8_6.11 (fixed in 0:2.1.2-4.el8_6.11)
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service: before 0:2.1.5-9.7.el8_8 (fixed in 0:2.1.5-9.7.el8_8)
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions: before 0:2.1.5-9.7.el8_8 (fixed in 0:2.1.5-9.7.el8_8)
  • Red Hat Red Hat Enterprise Linux 9: before 0:2.1.10-3.el9_8 (fixed in 0:2.1.10-3.el9_8)
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions: before 0:2.1.5-9.el9_2.7 (fixed in 0:2.1.5-9.el9_2.7)
  • Red Hat Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions: before 0:2.1.7-5.5.el9_4 (fixed in 0:2.1.7-5.5.el9_4)
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support: before 0:2.1.9-1.4.el9_6 (fixed in 0:2.1.9-1.4.el9_6)
  • Red Hat Red Hat Openshift Container Platform 4

Published 2026-06-16. Last modified 2026-08-21.