CVE-2026-31431: Copy Fail vulnerability enables Linux root privilege escalation across cloud environments
2026-05-02T14:52:20Z•219ac84fc6711a613ddbbbb05c4a5852da3b02bb63c97279d8ac27da141cc323
CVE-2026-31431Copy Failclouddetectionexploit-in-the-wildkernelkuberneteslinuxmitigationpatchingprivilege-escalation
What happened
CVE-2026-31431 (“Copy Fail”) is a high-severity Linux vulnerability that enables local root privilege escalation across cloud environments and Kubernetes workloads. Microsoft reports a working exploit in the wild; vulnerable systems can be escalated to root from within containerized or cloud-hosted instances. Organizations should prioritize detection, patching or mitigations, and apply cloud/Kubernetes hardening controls to reduce exposure.
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- microsoft_security_blog
- Record identifier
- 219ac84fc6711a613ddbbbb05c4a5852da3b02bb63c97279d8ac27da141cc323
- Enrichment time
- 2026-05-02T14:52:20Z
- AI-assisted enrichment
- Yes
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