Threats Tagged 'cve-2026-64156'

In the Linux kernel, the following vulnerability has been resolved: netfs, afs: Fix write skipping in dir/link writepages Fix netfs_write_single() and afs_single_writepages() to better handle a write that would be skipped due to lock contention and WB_SYNC_NONE by returning 1 from netfs_write_single() if it skipped and making afs_single_writepages() skip also. If a skip occurs, the inode must be re-marked as the VFS may have cleared the mark. This is really only theoretical for directories in netfs_write_single() as the only path to that is through afs_single_writepages() that takes the ->validate_lock around it, thereby serialising it.

A medium severity vulnerability (CVE-2026-64156) in the Linux kernel's netfs and AFS components has been resolved. The issue involved improper handling of write skipping in directory and link writepages due to lock contention and writeback synchronization flags. This could cause the inode to be incorrectly marked, potentially impacting availability. The vulnerability is theoretical for directories because of serialization via locking. No known exploits are reported.