CVE-2026-53154

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An issue exists in the Linux kernel within the hugetlb folio copy paths. When alloc hugetlb folio() is used to allocate a hugetlb folio, it consumes a Virtual Memory Area (VMA) reservation. If the subsequent call to copy user large folio() fails (for example, due to -EHWPOISON on a hardware-poisoned source page), the per-VMA reservation map entry remains marked as consumed even though folio put() restores the global hugetlb pool count. This occurs in the hugetlb mfill atomic pte() resubmission path (UFFDIO COPY) and the copy hugetlb page range() fork-time Copy-on-Write (CoW) path when hugetlb try dup anon rmap() fails. This leads to a reservation leak in the VMA's reserve map, which can cause a task to be SIGBUSed at a previously reserved address under hugetlb pool pressure.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.