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High7.5Red Hat Linux

High [CVE-2026-49975] Remote Denial of Service via compression bomb and Slowloris-style attack

This high-severity Red Hat Linux advisory covers CVE-2026-49975 affecting JBoss Core Services for RHEL 8, JBoss Core Services on RHEL 7, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

CVE-2026-49975 Published Jun 3, 2026
CVE-2026-49975
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Remote Denial of Service via compression bomb and Slowloris-style attack. Red Hat rates this important (CVSS 7.5).

Weakness: CWE-409. Affected package(s): jbcs-httpd24-httpd, mod_http2, jbcs-httpd24-mod_http2, httpd-main, httpd:2.4, openshift-service-mesh/proxyv2-rhel9:1781604724.

Resolved in Red Hat advisory RHSA-2026:27200 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: JBoss Core Services for RHEL 8; JBoss Core Services on RHEL 7; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 11 more.

Affected versions
  • jbcs-httpd24-httpd
  • jbcs-httpd24-httpd-0:2.4.62-13.el8jbcs
  • mod_http2-0:2.0.26-6.el9_8.1
  • jbcs-httpd24-mod_http2
  • jbcs-httpd24-httpd-0:2.4.62-13.el7jbcs
  • mod_http2-0:2.0.29-4.el10_2.1
  • httpd-main-2.4.68-1.hum1
  • jbcs-httpd24-mod_http2-0:2.0.29-10.el7jbcs
  • jbcs-httpd24-mod_http2-0:2.0.29-10.el8jbcs
  • httpd:2.4-8100020260608081321.489197e6
  • openshift-service-mesh/proxyv2-rhel9:1781604724

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:27200

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:27200 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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