How Cloudflare responded to the “Copy Fail” Linux vulnerability
2026-05-09T19:24:06Z•8b1224aef50ab4267ab496fdb2d9a52b5bee3b816c59e6edcb437a9408e67bb1
account-abuseacme-validationai-securityclient-side-securitycopy-failddosincident-responseipseclinux-kernelmanaged-oauthpingorapost-quantumprivilege-escalationradarrequest-smugglingvulnerability-scanner
What happened
Cloudflare security blog roundup (Dec 2025–May 2026): Cloudflare responded to a publicly disclosed, critical Linux kernel privilege-escalation dubbed “Copy Fail,” detecting, investigating, and mitigating the issue across its global fleet with zero confirmed customer impact or evidence of exploitation. Other security highlights include disclosure and fixes for request smuggling in Pingora OSS (fixed in Pingora 0.8.0), mitigations for an ACME certificate-validation issue, and product/security feature releases — post-quantum hybrid IPsec (GA) and a PQ roadmap targeting 2029, Client-Side Security,
Why it matters
A reviewed impact interpretation has not been published for this record.
Evidence and limitations
- Source ID
- cloudflare_security_blog
- Record identifier
- 8b1224aef50ab4267ab496fdb2d9a52b5bee3b816c59e6edcb437a9408e67bb1
- Enrichment time
- 2026-05-09T19:24:06Z
- AI-assisted enrichment
- Yes
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