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Posted on • Originally published at beyondmachines.net

Linux Kernel Pedit COW Vulnerability Grants Root Access via Page Cache Poisoning

Summary

The Linux kernel "pedit COW" vulnerability (CVE-2026-46331) allows local attackers to gain root access by poisoning the in-memory page cache of privileged binaries.

Take Action:

This flaw lets attackers hide in your server memory without ever touching the files on your disk. You should patch and reboot your Linux systems ASAP to clear any potential memory poisoning. If you can't patch right away, disable the act_pedit module or restrict unprivileged user namespaces as a temporary fix.


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This article was originally published on BeyondMachines

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