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VulnerabilityPublished Updated

CVE-2024-44947: Linux kernel · fuse: Initialize beyond-EOF page contents before setting uptodate fuse_notify_store(),

Affects Linux kernelSource GCVE Database

0

Not known to be exploited · CVSS 5.5 Medium · fixed in 4.4.0-1139.145 : update Linux kernel when convenient.

Data as of 27 Oct 2026, 00:02 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 4.4.0-1139.145, 4.15.0-1184.199~14.04.1, 4.4.0-262.296~14.04.1 +97
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Sep 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-50.51
Fixed in
  • 6.8.0-50.51
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1020.22
Fixed in
  • 6.8.0-1020.22
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1020.23
Fixed in
  • 6.8.0-1020.23
Ubuntu 24.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1019.21
Fixed in
  • 6.8.0-1019.21
Ubuntu 24.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1015.19
Fixed in
  • 6.8.0-1015.19
Ubuntu 24.04 LTSlinux-gkeoppkg:deb/ubuntu/linux-gkeop?arch=source&distro=nobleOther threatsAffected
  • <6.8.0-1002.4
Fixed in
  • 6.8.0-1002.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and has been released in multiple Linux kernel versions including 4.4.0-1139.145 and 4.15.0-1184.199~14.04.1. Users and administrators should update affected Linux kernel versions to these or later fixed releases to remediate the vulnerability. Systems with init-on-alloc enabled are not affected. No additional mitigation steps are required beyond applying the official kernel updates.

Description

CVE-2024-44947 is a medium severity information leak vulnerability in the Linux kernel's FUSE subsystem. The issue arises because fuse_notify_store() does not fully initialize page contents beyond the end-of-file before marking the page uptodate, unlike fuse_do_readpage(). This can expose uninitialized memory contents to userspace via mmap() on systems that do not enable init-on-alloc. The vulnerability affects certain Linux kernel versions prior to fixed releases. A patch is available and has been applied in multiple kernel versions.

References

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