CVE-2022-42319

Description

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored.

How to fix CVE-2022-42319

To remediate CVE-2022-42319, upgrade the affected package to a fixed version below.

• —upgrade to 4.15.4-r0 or later
• —upgrade to 4.14.5+86-g1c354767d5-1 or later

Is CVE-2022-42319 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 4.15.4-r0
• from 0, < 4.14.5+86-g1c354767d5-1

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2022-42319
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-42319