CVE-2026-53167

In the Linux kernel, the following vulnerability has been resolved:

fuse: limit FUSE_NOTIFY_RETRIEVE to uptodate folios

FUSE_NOTIFY_RETRIEVE must be limited to uptodate folios; !uptodate folios

can contain uninitialized data.

Since FUSE_NOTIFY_RETRIEVE is intended to only return data that is already

in the page cache and not wait for data from the FUSE daemon, treat

!uptodate folios as if they weren't present.

This only has security impact on systems that don't enable automatic

zero-initialization of all page allocations via

CONFIG_INIT_ON_ALLOC_DEFAULT_ON or init_on_alloc=1.