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Ubuntu Blog

Fixes available for CVE-2026-31431 (Copy Fail) Linux Kernel Local Privilege Escalation Vulnerability

Luci Stanescu (Luci Stanescu) · 5 days ago · Read original ↗

ATT&CK techniques detected

1 predictions
T1068Exploitation for Privilege Escalation
59%
“fixes available for cve - 2026 - 31431 ( copy fail ) linux kernel local privilege escalation vulnerability a local privilege escalation ( lpe ) vulnerability affecting the linux kernel has been publicly disclosed on april 29, 2026. the vulnerability has been assigned cve id cve -…”

Summary

A local privilege escalation (LPE) vulnerability affecting the Linux kernel has been publicly disclosed on April 29, 2026. The vulnerability has been assigned CVE ID CVE-2026-31431 and is referred to as Copy Fail. The affected component is a kernel module that provides hardware-accelerated cryptographic functions: algif_aead. The vulnerability affects all Ubuntu releases before Resolute (26.04). […]