Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mm: call ->free_folio() directly in folio_unmap_invalidate() We can only call filemap_free_folio() if we have a reference to (or hold a lock on) the mapping. Otherwise, we've already removed the folio from the mapping so it no longer pins the mapping and the mapping can be removed, causing a use-after-free when accessing mapping->a_ops. Follow the same pattern as __remove_mapping() and load the free_folio function pointer before dropping the lock on the mapping. That lets us make filemap_free_folio() static as this was the only caller outside filemap.c.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fb7d3bc4149395c1ae99029c852eab6c28fc3c88 before efc52947247a21bbf79059539bbbd40f4ea76f00; affected fb7d3bc4149395c1ae99029c852eab6c28fc3c88 before b667df39d98a7a24be7c2a40ff0863dac1ad2cd7; affected fb7d3bc4149395c1ae99029c852eab6c28fc3c88 before c330e65ea59c4805d6ab6757c4ddfe8c63acef31; affected fb7d3bc4149395c1ae99029c852eab6c28fc3c88 before 615d9bb2ccad42f9e21d837431e401db2e471195 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.27 through 6.18.*; unaffected 6.19.14 through 6.19.*; unaffected 7.0.1 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.