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redhat/kernel-rtUse After Free

Risk 72
Severity
7.8
Use After Free
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

A failing usercopy of the fencerep object will lead to a stale entry in the file descriptor table as putunusedfd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios.

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Source: Red Hat

Remedy

Mitigation for this issue is to skip loading the affected module vmwgfx onto the system until we have a fix available. This can be done by a blacklist mechanism and ensures the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~
First published (updated )
CVE-2022-22942

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