CVE-2022-42319medium
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.
References
https://xenbits.xenproject.org/xsa/advisory-416.txt
http://xenbits.xen.org/xsa/advisory-416.html
http://www.openwall.com/lists/oss-security/2022/11/01/6