RHSA-2026:47096MediumCVSS 7.5

Red Hat Security Advisory: compat-openssl10 security update

Published
July 28, 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 products16

  • Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.src as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-debuginfo-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-debuginfo-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-debuginfo-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-debuginfo-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-debugsource-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-debugsource-1:1.0.2o-3.el8_4.1.i686 as a component of Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)
  • compat-openssl10-debugsource-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
  • compat-openssl10-debugsource-1:1.0.2o-3.el8_4.1.x86_64 as a component of Red Hat Enterprise Linux AppStream 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)