Copy Fail
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CISA adds actively exploited Linux root flaw to known vulnerabilities list
CISA added a Linux kernel privilege escalation flaw known as Copy Fail to its exploited vulnerabilities catalog after signs of active abuse. The issue can let a local user gain root access, and patches are already available.
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Linux flaw could let local users gain root on many systems
Researchers disclosed a Linux local privilege escalation flaw, called Copy Fail, that could let a local unprivileged user gain root on systems shipped since 2017. The issue affects multiple major distributions and has been assigned CVE-2026-31431.
