RHSA-2026:84844HighCVSS 7.5

Red Hat Security Advisory: pcs security update

Published
October 19, 2026
Last Modified
October 29, 2026

🔗 CVE IDs covered (2)

CVE-2026-82397 →CVE-2024-14029 →

📋 Description

CVE-2024-14029 — python-tornado: Tornado before 6.4.1 HTTP Request Smuggling via Transfer-Encoding CVE-2026-82397 — python-tornado: Tornado: Denial of Service via excessive URL-encoded body fields

🎯 Affected products10

  • Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • Red Hat Enterprise Linux High Availability TUS (v.8.8)
  • pcs-0:0.10.15-4.el8_8.12.ppc64le as a component of Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • pcs-0:0.10.15-4.el8_8.12.src as a component of Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • pcs-0:0.10.15-4.el8_8.12.src as a component of Red Hat Enterprise Linux High Availability TUS (v.8.8)
  • pcs-0:0.10.15-4.el8_8.12.x86_64 as a component of Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • pcs-0:0.10.15-4.el8_8.12.x86_64 as a component of Red Hat Enterprise Linux High Availability TUS (v.8.8)
  • pcs-snmp-0:0.10.15-4.el8_8.12.ppc64le as a component of Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • pcs-snmp-0:0.10.15-4.el8_8.12.x86_64 as a component of Red Hat Enterprise Linux High Availability E4S (v.8.8)
  • pcs-snmp-0:0.10.15-4.el8_8.12.x86_64 as a component of Red Hat Enterprise Linux High Availability TUS (v.8.8)

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: Configure upstream reverse proxies or load balancers to strictly normalize HTTP headers and reject any incoming requests containing duplicate Transfer-Encoding headers before they reach the backend Tornado application worker. Workaround: Restrict request payload sizes or maximum form field counts at an upstream web application firewall (WAF) or reverse proxy layer before HTTP requests reach the Tornado application worker.

🔗 References (5)