Accesses to the CMOS memory contents are done using an indirect IO port pair. Therefore Xen needs to cache the guest chosen index, and one of the usa...

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

Accesses to the CMOS memory contents are done using an indirect IO port
pair. Therefore Xen needs to cache the guest chosen index, and one of
the usages of the index didn't take the necessary locking to avoid
concurrent changes. As a result, a guest could change the index after
it being checked, causing a subsequent out-of-bound read access to the
contents of an array.

出典: OSV.dev (Open Source Vulnerabilities) OSV

影響パッケージ

Alpine:v3.21 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.19.6-r0"}]}]

Alpine:v3.22 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4-r0"}]}]

Alpine:v3.23 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.20.4-r0"}]}]

Alpine:v3.24 xen

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.21.2-r0"}]}]

参照URL

advisory security.alpinelinux.org