CVE-2022-33744 Race condition in Linux

What is CVE-2022-33744?

CVE-2022-33744 is a medium-severity vulnerability in Debian Debian Linux, published on 5 Jul 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests' memory pages.

Which versions are affected by CVE-2022-33744?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2022-33744?

Apply the vendor's patch.

Is CVE-2022-33744 being exploited?

There is no known exploitation of CVE-2022-33744 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2022-33744, AZL-10108, DEBIAN-CVE-2022-33744, GHSA-256m-rvq9-56mx, UBUNTU-CVE-2022-33744.