Double-free CVE-2026-33811 via LookupCNAME in Go net (<=1.26.2)
CVE-2026-33811 Published on May 7, 2026

Vulnerability Analysis

Weakness Type

Products Associated with CVE-2026-33811

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Affected Versions

Go standard library net:

• Before 1.25.10 is affected.
• Version 1.26.0-0 and below 1.26.3 is affected.

Red Hat Cryostat 4 on RHEL 9:

• Version 4.2.0-19 and below * is unaffected.

Red Hat Ansible Automation Platform 2.5 for RHEL 8:

• Version 0:1.6.6-1.el8ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.5 for RHEL 8:

• Version 0:2.5.10-7.el8ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.5 for RHEL 9:

• Version 0:1.6.6-1.el9ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.5 for RHEL 9:

• Version 0:2.6.17-2.el9ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.6 for RHEL 10:

• Version 0:1.6.6-1.el10ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.6 for RHEL 9:

• Version 0:1.6.6-1.el9ap and below * is unaffected.

Red Hat Ansible Automation Platform 2.6 for RHEL 9:

• Version 0:2.6.17-2.el9ap and below * is unaffected.

Red Hat Enterprise Linux 10:

• Version 0:0.152.1-1.el10_2 and below * is unaffected.

Red Hat Enterprise Linux 10:

• Version 0:0.9.27-7.el10_2.2 and below * is unaffected.

Red Hat Enterprise Linux 10:

• Version 0:3.7.1-5.el10_2.6 and below * is unaffected.

Red Hat Enterprise Linux 10:

• Version 0:0.4.9.2-1.el10_2 and below * is unaffected.

Red Hat Enterprise Linux 10:

• Version 0:0.2.10-1.el10_2 and below * is unaffected.

Red Hat Enterprise Linux 10.0 Extended Update Support:

• Version 0:1.26.1-1.el10_0 and below * is unaffected.

Red Hat Enterprise Linux 8:

• Version 1:0.2.5-8.el8_10 and below * is unaffected.

Red Hat Enterprise Linux 8:

• Version 8100020260709093628.afee755d and below * is unaffected.

Red Hat Enterprise Linux 8:

• Version 0:3.4.1-12.el8_10 and below * is unaffected.

Red Hat Enterprise Linux 9:

• Version 0:0.152.1-1.el9_8 and below * is unaffected.

Red Hat Enterprise Linux 9:

• Version 0:1.2.11-2.el9_8 and below * is unaffected.

Red Hat Enterprise Linux 9:

• Version 0:3.7.1-4.el9_8.2 and below * is unaffected.

Red Hat OpenStack Services on OpenShift 18.0:

• Version 0:0.1.1-18.0.20260602234716.a95ae05.el9ost and below * is unaffected.

Red Hat Satellite 6.16 for RHEL 8:

• Version 0:0.0.4-1.el8sat and below * is unaffected.

Red Hat Satellite 6.16 for RHEL 9:

• Version 0:0.0.4-1.el9sat and below * is unaffected.

Red Hat Satellite 6.17 for RHEL 9:

• Version 0:0.0.4-1.el9sat and below * is unaffected.

Red Hat Satellite 6.18 for RHEL 9:

• Version 0:0.0.4-1.el9sat and below * is unaffected.

Red Hat Satellite 6.19 for RHEL 9:

• Version 0:0.0.4-1.el9sat and below * is unaffected.

Red Hat RHEM 1.0 for RHEL 9:

• Version 0:1.0.3-1.el9em and below * is unaffected.

Red Hat RHEM 1.1 for RHEL 10:

• Version 0:1.1.3-1.el10em and below * is unaffected.

Red Hat RHEM 1.1 for RHEL 9:

• Version 0:1.1.3-1.el9em and below * is unaffected.

Logging for Red Hat OpenShift 6.2:

• Version 1784747813 and below * is unaffected.

Logging for Red Hat OpenShift 6.4:

• Version 1782408807 and below * is unaffected.

Red Hat multicluster engine for Kubernetes 2.1:

• Version 1784915379 and below * is unaffected.

Red Hat multicluster engine for Kubernetes 2.6:

• Version 1783985999 and below * is unaffected.

Red Hat multicluster engine for Kubernetes 2.8:

• Version 1784306906 and below * is unaffected.

Red Hat Multicluster Global Hub 1.5.4:

• Version 1784127491 and below * is unaffected.

Red Hat Multicluster Global Hub 1.7.1:

• Version 1784768332 and below * is unaffected.

Red Hat OpenShift API for Data Protection 1.6:

• Version 1784058822 and below * is unaffected.

Red Hat Advanced Cluster Security 4.9:

• Version 1783357116 and below * is unaffected.

Red Hat Advanced Cluster Security for Kubernetes 4.10:

• Version 1783357140 and below * is unaffected.

Red Hat Advanced Cluster Security for Kubernetes 4.11:

• Version 1783352589 and below * is unaffected.

Red Hat Ansible Automation Platform 2.6:

• Version 1783962464 and below * is unaffected.

Red Hat Developer Hub 1.9:

• Version 1782767215 and below * is unaffected.

Red Hat Edge Manager 1.0:

• Version 1783502438 and below * is unaffected.

Red Hat Edge Manager 1.1:

• Version 1784194574 and below * is unaffected.

Red Hat Edge Manager 1.1:

• Version 1784127736 and below * is unaffected.

Red Hat Hardened Images:

• Version 1.25.11-2.hum1 and below * is unaffected.

Red Hat Hardened Images:

• Version 1.26.4-2.hum1 and below * is unaffected.

Red Hat Migration Toolkit 1.8:

• Version 1783914276 and below * is unaffected.

Red Hat Migration Toolkit for Applications 8.1:

• Version 1785171639 and below * is unaffected.

Red Hat Migration Toolkit for Applications 8.2:

• Version 1784211378 and below * is unaffected.

Red Hat multicluster global hub 1.4.4:

• Version 1784061472 and below * is unaffected.

Red Hat multicluster global hub 1.6.0:

• Version 1784152046 and below * is unaffected.

Red Hat OpenShift AI 2.25:

• Version 1783544461 and below * is unaffected.

Red Hat OpenShift AI 2.25:

• Version 1783946386 and below * is unaffected.

Red Hat OpenShift Builds 1.7.3:

• Version 1783057868 and below * is unaffected.

Red Hat OpenShift distributed tracing 3.10.1:

• Version 1785704547 and below * is unaffected.

Red Hat OpenShift GitOps 1.19:

• Version 1782292352 and below * is unaffected.

Red Hat OpenShift GitOps 1.2:

• Version 1782383826 and below * is unaffected.

Red Hat OpenShift GitOps 1.21:

• Version 1782910941 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.0:

• Version 1782222217 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.0:

• Version 1782223341 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.0:

• Version 1782296193 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.0:

• Version 1782222607 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.1:

• Version 1782222163 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.1:

• Version 1782223138 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.1:

• Version 1782222394 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.1:

• Version 1782222451 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.2:

• Version 1782226178 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.2:

• Version 1782224487 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.2:

• Version 1782303211 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.2:

• Version 1782224541 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.3:

• Version 1782223045 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.3:

• Version 1782222366 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.3:

• Version 1782310747 and below * is unaffected.

Red Hat OpenShift Service Mesh 3.3:

• Version 1782222038 and below * is unaffected.

Red Hat Trusted Artifact Signer 1.4:

• Version 4-1.4.2 and below * is unaffected.
• Version 4-1.4.3 and below * is unaffected.

Red Hat Web Terminal 1.11:

• Version 1784296203 and below * is unaffected.

Red Hat Web Terminal 1.12:

• Version 1784247610 and below * is unaffected.

Red Hat Web Terminal 1.13:

• Version 1784296127 and below * is unaffected.

Red Hat Web Terminal 1.14:

• Version 1784296114 and below * is unaffected.

Red Hat Web Terminal 1.15:

• Version 1784296033 and below * is unaffected.

Red Hat Web Terminal 1.16:

• Version 1784295767 and below * is unaffected.

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Exploit Probability