Amazon Linux 2023: CVE-2022-42328: Important priority package update for kernel

Guests can trigger deadlock in Linux netback driver T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The patch for XSA-392 introduced another issue which might result in a deadlock when trying to free the SKB of a packet dropped due to the XSA-392 handling (CVE-2022-42328). Additionally when dropping packages for other reasons the same deadlock could occur in case of netpoll being active for the interface the xen-netback driver is connected to (CVE-2022-42329).
A possible deadlock flaw was found in the Linux kernel’s XEN driver in how some packets generated by a user dropped. This flaw allows a local user to crash the system.