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Almost 40% of Ubuntu users vulnerable to new privilege elevation flaws
(www.bleepingcomputer.com)
this post was submitted on 27 Jul 2023
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CVE-2023-2640
Needs a user account on the system (even unprivledged accounts) via overlayfs
Overlayfs allows one, usually read-write, directory tree to be overlaid onto another, read-only directory tree. All modifications go to the upper, writable layer. This type of mechanism is most often used for live CDs but there is a wide variety of other uses.
Or a docker container.