CVE-2022-42321 Denial of service in xen

What is CVE-2022-42321?

CVE-2022-42321 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 1 Nov 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.

Weakness: CWE-674

Which versions are affected by CVE-2022-42321?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Xen Xen.

How do I fix CVE-2022-42321?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-42321 being exploited?

There is no known exploitation of CVE-2022-42321 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-2022-42321, DEBIAN-CVE-2022-42321, GHSA-fwfg-5hqv-4r78, UBUNTU-CVE-2022-42321.