CVE-2022-48700

[REJECTED CVE] A vulnerability was identified in the Linux kernel’s vfio/type1 subsystem, where a reference count leak on the zero page occurred due to improper handling in put_pfn(). The page was pinned via pin_user_pages_remote() but not properly unpinned, leading to a resource exhaustion risk. An attacker could exploit this by repeatedly mapping zero pages, potentially causing a reference count overflow, leading to undefined behavior or system instability.

This CVE has been rejected upstream: https://lore.kernel.org/linux-cve-announce/2024121951-REJECTED-a412@gregkh/

Red Hat has also evaluated this issue and determined that it does not meet the criteria to be classified as a security vulnerability. This assessment is based on the issue not posing a significant security risk, being a result of misconfiguration or usage error, or falling outside the scope of security considerations.

As such, this CVE has been marked as "Rejected" in alignment with Red Hat's vulnerability management policies.

If you have additional information or concerns regarding this determination, please contact Red Hat Product Security for further clarification.

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.