CVE-2022-50087

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

firmware: arm_scpi: Ensure scpi_info is not assigned if the probe fails

When scpi probe fails, at any point, we need to ensure that the scpi_info is not set and will remain NULL until the probe succeeds. If it is not taken care, then it could result use-after-free as the value is exported via get_scpi_ops() and could refer to a memory allocated via devm_kzalloc() but freed when the probe fails.

This vulnerability is rated Moderate for Red Hat Enterprise Linux 8 and 9. A use-after-free flaw in the arm_scpi firmware component of the Linux kernel could allow a local attacker to escalate privileges. Triggering this vulnerability requires precise timing conditions that need to coincide with the rare event of an scpi probe failure; scpi probes are typically only present on ARM platforms with scp firmware. As such, exploitation is non-trivial and environment-specific.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.