Description
这是一个影响广泛的本地提权（LPE）漏洞，允许低权限用户通过特定的系统调用组合，篡改内存中的只读文件缓存，从而获得 root 权限。
Linux Kernel "Copy Fail" 本地权限提升漏洞(CVE-2026-31431)
PoC
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https://nvd.nist.gov/vuln/detail/CVE-2026-31431
https://copy.fail/
https://xint.io/blog/copy-fail-linux-distributions
https://www.microsoft.com/en-us/security/blog/2026/05/01/cve-2026-31431-copy-fail-vulnerability-enables-linux-root-privilege-escalation/
https://unit42.paloaltonetworks.com/cve-2026-31431-copy-fail/
https://ubuntu.com/security/CVE-2026-31431
https://access.redhat.com/security/cve/cve-2026-31431
https://www.sysdig.com/blog/cve-2026-31431-copy-fail-linux-kernel-flaw-lets-local-users-gain-root-in-seconds
https://almalinux.org/blog/2026-05-01-cve-2026-31431-copy-fail/
https://github.com/theori-io/copy-fail-CVE-2026-31431
https://cert.europa.eu/publications/security-advisories/2026-005/
https://blog.cloudflare.com/copy-fail-linux-vulnerability-mitigation/
https://en.wikipedia.org/wiki/Copy_Fail