RHSA-2026:43513MediumCVSS 7.5

Red Hat Security Advisory: openssl security update

Published
July 22, 2026
Last Modified
July 30, 2026

🔗 CVE IDs covered (1)

CVE-2026-28390 →

📋 Description

CVE-2026-28390 — openssl: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing

🎯 Affected products28

  • Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-1:1.1.1g-18.el8_4.3.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-1:1.1.1g-18.el8_4.3.src as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-debuginfo-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-debuginfo-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-debuginfo-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-debuginfo-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-debugsource-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-debugsource-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-debugsource-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-debugsource-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-devel-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-devel-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-devel-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-devel-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-libs-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-libs-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-libs-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-libs-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-libs-debuginfo-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-libs-debuginfo-1:1.1.1g-18.el8_4.3.i686 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-libs-debuginfo-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-libs-debuginfo-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)
  • openssl-perl-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4)
  • openssl-perl-1:1.1.1g-18.el8_4.3.x86_64 as a component of Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)

✅ 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: Applications that process Cryptographic Message Syntax (CMS) EnvelopedData messages should be configured to only accept input from trusted sources. Restricting network access to services that process untrusted CMS data can also reduce exposure to this Denial of Service vulnerability.

🔗 References (4)