CVE-2024-44947: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.9% chance of exploitation in the next 30 days.

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).

Affected products

• Linux Linux Kernel: from 2.6.36, before 4.19.321 (fixed in 4.19.321); from 4.20, before 5.4.283 (fixed in 5.4.283); from 5.5, before 5.10.225 (fixed in 5.10.225); from 5.11, before 5.15.166 (fixed in 5.15.166); from 5.16, before 6.1.107 (fixed in 6.1.107); from 6.2, before 6.6.48 (fixed in 6.6.48); …

Published 2024-09-02. Last modified 2026-06-17.