The EVTCHNOP_expand_array hypercall checks for whether FIFO event channels are enabled, but without holding the correct lock. It can race with EVTCHN...

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)。

The EVTCHNOP_expand_array hypercall checks for whether FIFO event
channels are enabled, but without holding the correct lock. It can race
with EVTCHNOP_reset, resulting in dereferencing a NULL pointer.

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