RHSA-2026:53848HighCVSS 7.5

Red Hat Security Advisory: isns-utils security update

Published
August 11, 2026
Last Modified
August 26, 2026

🔗 CVE IDs covered (1)

CVE-2026-55995 →

📋 Description

CVE-2026-55995 — open-isns: open-iscsi: Denial of Service via double-free in iSNS attribute decoder

🎯 Affected products31

  • Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-0:0.99-1.el8_10.1.src as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-0:0.99-1.el8_10.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debuginfo-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debuginfo-0:0.99-1.el8_10.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debuginfo-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debuginfo-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debuginfo-0:0.99-1.el8_10.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debugsource-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debugsource-0:0.99-1.el8_10.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debugsource-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debugsource-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-debugsource-0:0.99-1.el8_10.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-devel-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-devel-0:0.99-1.el8_10.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-devel-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-devel-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-devel-0:0.99-1.el8_10.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-0:0.99-1.el8_10.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-0:0.99-1.el8_10.1.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-debuginfo-0:0.99-1.el8_10.1.aarch64 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-debuginfo-0:0.99-1.el8_10.1.i686 as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-debuginfo-0:0.99-1.el8_10.1.ppc64le as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • isns-utils-libs-debuginfo-0:0.99-1.el8_10.1.s390x as a component of Red Hat Enterprise Linux BaseOS (v. 8)
  • +1 more not shown

✅ 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: If the iSNS service is not actively used, disable it to prevent exploitation. To disable the `isnsd` service, execute `systemctl disable --now isnsd`. If the iSNS service is required, restrict network access to UDP port 3260 to only trusted hosts and networks using firewall rules. A service restart may be required for changes to take effect.

🔗 References (4)