CVE-2022-42309 Memory corruption in xen

What is CVE-2022-42309?

CVE-2022-42309 is a high-severity memory corruption 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 Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.

Weakness: CWE-763

Which versions are affected by CVE-2022-42309?

It affects 3 products.

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

How do I fix CVE-2022-42309?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2022-42309 being exploited?

There is no known exploitation of CVE-2022-42309 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-2022-42309, DEBIAN-CVE-2022-42309, GHSA-qghj-pfv2-q8gw, UBUNTU-CVE-2022-42309.