From Exploit Code to Production Detection: Building a CVE-2026-31431 (Copy Fail) detection with Agents
CVE-2026-31431 (Copy Fail) lets any unprivileged user corrupt the Linux page cache via AF_ALG sockets to escalate privileges. This post covers the exploit mechanics and how Datadog Security Research used coding agents to ship a detection content pack in a single session.
- Vendor
- Datadog
- Product
- Datadog Agent
- Exploitation
- public exploit code reported
- Exposure class
- Network management
Why it ranks 33 (Notable)
- Public exploit code reported
- Product class: network management
- Covered by 4 independent sources
- Threat research
- Recency: items published within 24 hours gain 15, within 72 hours 6, within 7 days 2.
Links
- Datadog Security Labs (securitylabs.datadoghq.com)
- CVE-2026-31431 on this site · NVD · CVE.org · Vulnpedia
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