Update mitigation guidance and tools for CVE-2026-31431#73
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SergeyKanzhelev merged 9 commits intoGoogleCloudPlatform:masterfrom May 1, 2026
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hoskeri
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Apr 30, 2026
rkolchmeyer
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Apr 30, 2026
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You should also add in the initcall_blacklist=algif_aead_init advice here, not just the daemonset. |
rkolchmeyer
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Apr 30, 2026
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Approver please squash-merge. |
SergeyKanzhelev
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May 1, 2026
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This PR introduces immediate mitigation strategies and deployment instructions for CVE-2026-31431 (Copy Fail), a Linux kernel vulnerability that allows for container escapes and local privilege escalation via the
AF_ALGsocket family.It updates two directories with respective mitigation methods:
spo-seccomp-mitigation/: Contains a custom Seccomp profile and binding to be deployed via the Security Profiles Operator (SPO). This profile blocksAF_ALGsocket creation at the workload level and is the recommended mitigation for GKE Autopilot clusters or environments where privileged DaemonSets are prohibited.disable-algif-aead/: Contains a privileged DaemonSet that edits the node's/etc/modprobe.dconfiguration to blacklist the vulnerablealgif_aeadmodule. The README includes important caveats regarding Secure Boot and Spot (Preemptible VM) nodes.These mitigations are intended to protect clusters while upstream kernel patches are being absorbed and rolled out.