CVE-2025-21860 mm/zswap: fix inconsistency when zswap_store_page() fails

In the Linux kernel, the following vulnerability has been resolved: mm/zswap: fix inconsistency when zswapstorepage fails Commit b7c0ccdfbafd "mm: zswap: support large folios in zswapstore" skips charging any zswap entries when it failed to zswap the entire folio. However, when some base pages ar...

CVE-2025-21860

The CVE-2025-21860 entry relates to a Linux kernel zswap bug in which inconsistent accounting occurs when zswap_store_page() fails to swap an entire folio after some base pages were swapped. The root cause was skipping charging zswap entries on failed swaps, which could lead to uncharged entries ...