CVE-2025-22000: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: drop beyond-EOF folios with the right number of refs When an after-split folio is large and needs to be dropped due to EOF, folio_put_refs(folio, folio_nr_pages(folio)) should be used to drop all page cache refs. Otherwise, the folio will not be freed, causing memory leak. This leak would happen on a filesystem with blocksize > page_size and a truncate is performed, where the blocksize makes folios split to >0 order ones, causing truncated folios not being freed.

Affected products

• Linux Linux Kernel: from 6.9, before 6.12.21 (fixed in 6.12.21); from 6.13, before 6.13.9 (fixed in 6.13.9); version 6.14 only

Published 2025-04-03. Last modified 2026-06-17.