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7.8 — HIGH

CISA Warns of Linux “Copy Fail” 0-Day Vulnerability Exploited to Root Systems

📅 4 May 2026 at 11:57 UTC📰 Cyber Security NewsView original source ↗
CISA Warns of Linux “Copy Fail” 0-Day Vulnerability Exploited to Root Systems

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical Linux kernel zero-day vulnerability to its Known Exploited Vulnerabilities (KEV) catalog, warning federal agencies and organizations worldwide to patch immediately or discontinue use of affected systems. Tracked as CVE-2026-31431 and dubbed “Copy Fail”, the flaw carries a CVSS score of 7.8 (High) and […] The post CISA Warns of Linux “Copy Fail” 0-Day Vulnerability Exploited to Root Systems appeared first on Cyber Security News.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A critical Linux kernel zero-day vulnerability (CVE-2026-31431) has been exploited to gain root access on affected systems, prompting CISA to issue an immediate warning to patch or discontinue use of vulnerable systems.

⚙️Technical Details
CVEs
CVE-2026-31431
Affected Systems
Amazon Amazon LinuxArista Cloudvision AgniArista Cloudvision PortalArista Netvisor OsArista Velocloud EdgeAttack Vector: LOCAL
💥Impact Assessment
Severity: Critical
🛡️Recommended Actions
1Apply patches from the provided Git kernel links to affected systems.
2Immediately discontinue use of vulnerable Arista Cloudvision Agni, Portal, Netvisor Os, and Velocloud Edge systems.
3Conduct a thorough vulnerability scan on all Linux-based systems to identify potential exploitation.
📦Affected Products
Amazon Amazon LinuxArista Cloudvision AgniArista Cloudvision PortalArista Netvisor OsArista Velocloud EdgeArista Velocloud GatewayCanonical Ubuntu LinuxDebian Debian LinuxLinux Linux KernelNixos Nixos
🔐NVD Verified DataVERIFIED
CVE-2026-31431 ↗CVSS 7.8 — HIGH
Attack Vector
LOCAL
Complexity
LOW
Vector String
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-669
Affected Products (CPE)
Amazon Amazon LinuxArista Cloudvision AgniArista Cloudvision PortalArista Netvisor OsArista Velocloud Edge

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