Signal
CISA warns of active exploitation of 'CopyFail' Linux kernel vulnerability
Evidence first: scan the strongest sources, then decide whether to go deeper.
Published 2026-05-04 18:13 UTCUpdated 2026-05-05 15:01 UTC
rss
cveexploitssecurity_advisorylinux_kernelincident_response
Trend in the last 24h
Source links open
Source links and full evidence are open here. Archive history, compare-over-time, alerts, exports, API, integrations, and workflow are paid.
No card needed for the free brief.
Evidence trail (top sources)
top sources (3 domains)domains are deduped. counts indicate coverage, not truth.3 top sources shown
Overview
A critical Linux kernel vulnerability known as 'CopyFail' (CVE-2026-31431) is actively exploited in the wild, enabling attackers with local authenticated access to gain root privileges. The bug affects all mainstream Linux kernels since 2017.
Entities
TheoriXint
Score total
1.18
Momentum 24h
3
Posts
3
Origins
3
Source types
1
Duplicate ratio
0%
Why now
- Active exploitation detected days after public disclosure.
- CISA has officially listed the vulnerability as exploited, increasing awareness.
- Patches are available but require immediate deployment to mitigate risk.
Why it matters
- The vulnerability enables root-level access, risking full system compromise.
- Linux kernels since 2017 are affected, impacting a broad range of systems.
- Rapid exploitation highlights urgency for patching to prevent attacks.
LLM analysis
Topic mix: lowPromo risk: lowSource quality: medium
Recurring claims
- The 'CopyFail' Linux kernel vulnerability allows attackers with authenticated local access to gain root privileges.
- CISA has added the 'CopyFail' vulnerability to its list of known exploited vulnerabilities and urges immediate patching.
How sources frame it
- Theori (discovery Company): neutral
All evidence
All evidence
Attackers are cashing in on fresh 'CopyFail' Linux flaw
theregister_security · go.theregister.com · 2026-05-05 15:01 UTC
‘Copy Fail’ is a real Linux security crisis wrapped in AI slop
CyberScoop · cyberscoop.com · 2026-05-04 21:54 UTC
Copy Fail bug added to CISA's list of known exploited vulnerabilities
SC Media · scworld.com · 2026-05-04 18:13 UTC
Show filters & breakdown
Posts loaded: 0Publishers: 3Origin domains: 3Duplicates: -
Showing 3 / 0
Top publishers (this list)
- theregister_security (1)
- CyberScoop (1)
- SC Media (1)
Top origin domains (this list)
- go.theregister.com (1)
- cyberscoop.com (1)
- scworld.com (1)