CVE-2024-57937

[REJECTED CVE] A vulnerability in the Linux kernel's memory management subsystem caused a regression that unintentionally prevented memfd mappings sealed with F_SEAL_WRITE from being mapped as read-only. This was due to an incorrect placement of the mapping_map_writable() check before invoking shmem_mmap(), effectively undoing previous logic that allowed such mappings. An attacker could exploit this by restricting legitimate read-only mappings, potentially causing denial-of-service conditions for applications relying on memfd protections.

This CVE has been rejected upstream: https://lore.kernel.org/linux-cve-announce/2025012231-REJECTED-b9cc@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.