CVE-2026-31431 FortiOS Impact: CopyFail Patch and Detection Guide
CVE-2026-31431 CopyFail Linux kernel LPE affects FortiOS-based FortiGate appliances. A 732-byte public exploit grants root. Check your FortiOS version and patch.
Score breakdown
- CISA KEV
- 25.0/25
- EPSS
- 19.3/20
- CVSS
- 7.8/10
- Exploited in wild
- 10.0/10
- Ransomware use
- 5.0/5
- Editorial impact
- 7.0/10
- Recency
- 1.0/10
- Patch deadline near
- 0.0/10