Threats Tagged 'cve-2026-64062'

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential deadlock in write-through mode Fix netfs_advance_writethrough() to always unlock the supplied folio and to mark it dirty if it isn't yet written to the end. Unfortunately, it can't be marked for writeback until the folio is done with as that may cause a deadlock against mmapped reads and writes. Even though it has been marked dirty, premature writeback can't occur as the caller is holding both inode->i_rwsem (which will prevent concurrent truncation, fallocation, DIO and other writes) and ictx->wb_lock (which will cause flushing to wait and writeback to skip or wait). Note that this may be easier to deal with once the queuing of folios is split from the generation of subrequests.

A vulnerability in the Linux kernel's netfs subsystem involving a potential deadlock in write-through mode has been resolved. The issue was due to improper handling in netfs_advance_writethrough(), which could cause a deadlock by premature writeback during folio processing. The fix ensures the folio is always unlocked and marked dirty appropriately, preventing deadlocks related to mmapped reads and writes. The vulnerability does not have a CVSS score or known exploits in the wild.