CVE-2026-64294

A flaw was found in the Linux kernel's memory management subsystem. This vulnerability arises from incorrect handling of file ownership checks within idmapped mounts, a feature that allows remapping user and group IDs. When certain memory operations are performed on files in an idmapped mount, the system may use an improper identifier mapping, causing ownership checks to fail unexpectedly. This could potentially lead to unintended information disclosure in specific, complex scenarios.

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.