CVE-2023-52451

A flaw was found in the Linux kernel, specifically affecting the PowerPC architecture's pseries memory hotplug functionality. The issue arises from the dlpar_memory_remove_by_index() function, which may access memory beyond the bounds of the drmem logical memory block (LMB) array when it fails to find a matching entry for a given Dynamic Reconfiguration Connector (DRC) index. This out-of-bounds access can lead to unintended behavior, including potential system crashes or exposure of sensitive information.

The vulnerability was discovered through code inspection and confirmed using Kernel Address Sanitizer (KASAN) tools. To address this issue, the Linux kernel has been updated to ensure that failed lookups are logged separately, and pointers are dereferenced only when they point to valid entries.

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.

No mitigation is currently available for this vulnerability. Make sure to perform the updates as they become available.