CVE-2024-44947: Linux kernel · fuse: Initialize beyond-EOF page contents before setting uptodate
Source GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 29 Oct 2026, 22:52 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 2 Sep 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
Description
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).
References
- nvd.nist.gov/vuln/detail/CVE-2024-44947 (opens in a new tab)
- git.kernel.org/stable/c/18a067240817bee8a9360539af5d79a4bf5398a5 (opens in a new tab)
- git.kernel.org/stable/c/33168db352c7b56ae18aa55c2cae1a1c5905d30e (opens in a new tab)
- git.kernel.org/stable/c/3c0da3d163eb32f1f91891efaade027fa9b245b9 (opens in a new tab)
- git.kernel.org/stable/c/4690e2171f651e2b415e3941ce17f2f7b813aff6 (opens in a new tab)
- git.kernel.org/stable/c/49934861514d36d0995be8e81bb3312a499d8d9a (opens in a new tab)
- git.kernel.org/stable/c/831433527773e665bdb635ab5783d0b95d1246f4 (opens in a new tab)
- git.kernel.org/stable/c/8c78303eafbf85a728dd84d1750e89240c677dd9 (opens in a new tab)
- git.kernel.org/stable/c/ac42e0f0eb66af966015ee33fd355bc6f5d80cd6 (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/10/msg00003.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/01/msg00001.html (opens in a new tab)
- project-zero.issues.chromium.org/issues/42451729 (opens in a new tab)