CVE-2022-42324 Integer overflow in xen

What is CVE-2022-42324?

CVE-2022-42324 is a medium-severity 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

Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.

Weakness: CWE-681

Which versions are affected by CVE-2022-42324?

It affects 3 products.

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

How do I fix CVE-2022-42324?

Apply the vendor's patch.

Is CVE-2022-42324 being exploited?

There is no known exploitation of CVE-2022-42324 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-2022-42324, DEBIAN-CVE-2022-42324, GHSA-2hqj-m7qj-9pc3, UBUNTU-CVE-2022-42324.