Use-After-Free and Privilege Escalation in Linux Kernel with Unprivileged User Namespaces

Use-After-Free and Privilege Escalation in Linux Kernel with Unprivileged User Namespaces

CVE-2022-24122 · HIGH Severity

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

kernel/ucount.c in the Linux kernel 5.14 through 5.16.4, when unprivileged user namespaces are enabled, allows a use-after-free and privilege escalation because a ucounts object can outlive its namespace.

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