In the Linux kernel, the following vulnerability has been resolved:

ACPI: processor: idle: Check acpi_fetch_acpi_dev() return value

The return value of acpi_fetch_acpi_dev() could be NULL, which would
cause a NULL pointer dereference to occur in acpi_device_hid().

[ rjw: Subject and changelog edits, added empty line after if () ]

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-50327
• https://git.kernel.org/stable/c/2437513a814b3e93bd02879740a8a06e52e2cf7d
• https://git.kernel.org/stable/c/2ecd629c788bbfb96be058edade2e934d3763eaf
• https://git.kernel.org/stable/c/8e8b5f12ee4ab6f5d252c9ca062a4ada9554e6d9
• https://git.kernel.org/stable/c/ad1190744da9d812da55b76f2afce750afb0a3bd
• https://git.kernel.org/stable/c/b85f0e292f73f353eea915499604fbf50c8238b4
• https://git.kernel.org/stable/c/fdee7a0acc566c4194d40a501b8a1584e86cc208