CVE-2026-64062

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netfs: Fix potential deadlock in write-through mode<br /> <br /> Fix netfs_advance_writethrough() to always unlock the supplied folio and to<br /> mark it dirty if it isn&amp;#39;t yet written to the end. Unfortunately, it can&amp;#39;t<br /> be marked for writeback until the folio is done with as that may cause a<br /> deadlock against mmapped reads and writes.<br /> <br /> Even though it has been marked dirty, premature writeback can&amp;#39;t occur as<br /> the caller is holding both inode-&gt;i_rwsem (which will prevent concurrent<br /> truncation, fallocation, DIO and other writes) and ictx-&gt;wb_lock (which<br /> will cause flushing to wait and writeback to skip or wait).<br /> <br /> Note that this may be easier to deal with once the queuing of folios is<br /> split from the generation of subrequests.