CVE-2023-53671

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.1.0-rc1

Description The Linux kernel contains a flaw related to SRCU (Sub Read Copy Update). A commit assumed that CPU 0 is always online, but this is not always the case, particularly when booting a kdump kernel with the maxcpus=1 boot parameter. This can lead to the system hanging, as observed on PowerPC systems during kdump kernel boot. The issue involves delegating work to the boot CPU when using srcu size small.

Recommendations Update to a newer version of the Linux kernel that includes the fix for this vulnerability.