CVE-2022-23034 Integer overflow in xen

What is CVE-2022-23034?

CVE-2022-23034 is a medium-severity vulnerability in Debian Debian Linux, published on 25 Jan 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.

Weakness: CWE-191

Which versions are affected by CVE-2022-23034?

It affects 3 products.

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

How do I fix CVE-2022-23034?

Apply the vendor's patch.

Is CVE-2022-23034 being exploited?

There is no known exploitation of CVE-2022-23034 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-2022-23034, DEBIAN-CVE-2022-23034, GHSA-5jmq-x85f-gprc, UBUNTU-CVE-2022-23034.