In the Linux kernel, the following vulnerability has been resolved:
fuse: Initialize beyond-EOF page contents before setting uptodate
fuse_notify_store(), unlike fuse_do_readpage(), does not enable page
zeroing (because it can be used to change partial page contents).
So fuse_notify_store() must be more careful to fully initialize page
contents (including parts of the page that are beyond end-of-file)
before marking the page uptodate.
The current code can leave beyond-EOF page contents uninitialized, which
makes these uninitialized page contents visible to userspace via mmap().
This is an information leak, but only affects systems which do not
enable init-on-alloc (via CONFIG_INIT_ON_ALLOC_DEFAULT_ON=y or the
corresponding kernel command line parameter).
CVE ID: CVE-2024-44947
CVSS Base Severity: MEDIUM
CVSS Base Score: 5.5
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Vendor: Linux
Product: Linux
EPSS Score: 0.76% (probability of being exploited)
EPSS Percentile: 72.33% (scored less or equal to compared to others)
EPSS Date: 2025-06-02 (when was this score calculated)
SSVC Exploitation: none
SSVC Technical Impact: partial
SSVC Automatable: false