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Critical9.0Vendor: HighRed Hat Linux

Critical [CVE-2026-27140] Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names

This critical-severity Red Hat Linux advisory covers CVE-2026-27140 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

CVE-2026-27140 Published Apr 8, 2026
CVE-2026-27140
Affected products & platforms
Red Hat LinuxUnclassified
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Summary

Go (golang) and cmd/go: Arbitrary Code Execution via malicious SWIG file names. Red Hat rates this important (CVSS 9).

Weakness: CWE-641.

Affected package(s): openshift4/cloud-network-config-controller-rhel9:1780040126, openshift4/ose-agent-installer-utils-rhel9:1780044523, openshift4/ose-vsphere-csi-driver-rhel9-operator:1780040095, openshift4/ose-aws-cloud-controller-manager-rhel9:1780040386, openshift4/ose-aws-cluster-api-controllers-rhel9:1780040551, openshift4/ose-ironic-machine-os-downloader-rhel9:1780365576.

Resolved in Red Hat advisory RHSA-2026:10704 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; and 12 more.

Affected versions
  • openshift4/cloud-network-config-controller-rhel9:1780040126
  • openshift4/ose-agent-installer-utils-rhel9:1780044523
  • openshift4/ose-vsphere-csi-driver-rhel9-operator:1780040095
  • openshift4/ose-aws-cloud-controller-manager-rhel9:1780040386
  • openshift4/ose-aws-cluster-api-controllers-rhel9:1780040551
  • openshift4/ose-ironic-machine-os-downloader-rhel9:1780365576
  • openshift4/ose-ovn-kubernetes-microshift-rhel9:1780046352
  • golang-0:1.17.13-12.el9_0
  • openshift4/ose-olm-operator-controller-rhel9:1780045015
  • openshift4/ose-multus-route-override-cni-rhel9:1780040139
  • openshift4/openshift-route-controller-manager-rhel9:1780042119
  • openshift4/ose-console-rhel9-operator:1780043143

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • RHSA-2026:10704

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Update the affected package(s) to the fixed version shipped in RHSA-2026:10704 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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