RHSA-2026:25057HighCVSS 7.5

Red Hat Security Advisory: mod_http2 security update

Published
June 10, 2026
Last Modified
August 18, 2026

🔗 CVE IDs covered (1)

CVE-2026-49975 →

📋 Description

CVE-2026-49975 — httpd: httpd: HTTP/2 Remote Denial of Service via compression bomb and Slowloris-style attack

🎯 Affected products14

  • Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-0:2.0.26-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-0:2.0.26-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-0:2.0.26-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-0:2.0.26-6.el9_8.1.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-0:2.0.26-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debuginfo-0:2.0.26-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debuginfo-0:2.0.26-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debuginfo-0:2.0.26-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debuginfo-0:2.0.26-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debugsource-0:2.0.26-6.el9_8.1.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debugsource-0:2.0.26-6.el9_8.1.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debugsource-0:2.0.26-6.el9_8.1.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
  • mod_http2-debugsource-0:2.0.26-6.el9_8.1.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)

✅ 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: See the security bulletin for a detailed mitigation procedure.

🔗 References (4)