Cloudflare patches Copy-Fail across all servers in two days
Source Reddit Cybersecurity
Rated by Threat Radar
Data as of 23 Jun 2026, 12:09 UTC
What to do
AI-suggested
Cloudflare has fully patched the Copy-Fail vulnerability across their servers. No further action is required from Cloudflare customers relying on their infrastructure. For other Linux server operators, it is recommended to review the vendor advisory and apply available patches or mitigations for Copy-Fail as soon as possible. Patch status for other environments is not confirmed in this data; check vendor advisories for updates.
Discussion
Cloudflare addressed the Copy-Fail vulnerability by developing and deploying patches across all their servers within two days of the CVE disclosure. The rapid mitigation effort highlights Cloudflare's capability to quickly respond to Linux kernel vulnerabilities using custom BPF-LSM patches. No specific affected software versions or exploitation details are provided in the source data.
r/cybersecurity (opens in a new tab)u/xmull1gan0 points0 comments
Kind of crazy to look at the graph in this blog. CVE drops on 04/29, they develop a patch on 4/30, and deploy it across all of their servers on 05/01. Obviously they have the engineers to write BPF-LSM patches, but I think it points to a future where they can (almost) keep up with vulnerability disclosures.
https://blog.cloudflare.com/copy-fail-linux-vulnerability-mitigation/