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NVD / CVE Program· CNA Linux

CVE-2024-44947: fuse: Initialize beyond-EOF page contents before setting uptodate

Noroxi assessment

Priority: Monitor (action score 22/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.88% (FIRST EPSS); higher than 59.2% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 18a067240817bee8a9360539af5d79a4bf5398a5, 33168db352c7b56ae18aa55c2cae1a1c5905d30e, 3c0da3d163eb32f1f91891efaade027fa9b245b9.

Low priority for now. Upgrade to Linux Linux 18a067240817bee8a9360539af5d79a4bf5398a5, 33168db352c7b56ae18aa55c2cae1a1c5905d30e, 3c0da3d163eb32f1f91891efaade027fa9b245b9 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

MediumCVSS 5.5 · v3.1—Proof of concept Fix available
Published
Sep 2, 2024
Updated
Jun 17, 2026
EPSS
0.8% · 59th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-44947

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel2.6.36 and later · before 4.19.321
  • linux linux kernel4.20 and later · before 5.4.283
  • linux linux kernel5.5 and later · before 5.10.225
  • linux linux kernel5.11 and later · before 5.15.166
  • linux linux kernel5.16 and later · before 6.1.107
  • linux linux kernel6.2 and later · before 6.6.48
  • linux linux kernel6.7 and later · before 6.10.7
  • linux linux kernel6.11

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.36affected
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 49934861514d36d0995be8e81bb3312a499d8d9aaffected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 33168db352c7b56ae18aa55c2cae1a1c5905d30eaffected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 4690e2171f651e2b415e3941ce17f2f7b813aff6affected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 8c78303eafbf85a728dd84d1750e89240c677dd9affected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 831433527773e665bdb635ab5783d0b95d1246f4affected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before ac42e0f0eb66af966015ee33fd355bc6f5d80cd6affected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 18a067240817bee8a9360539af5d79a4bf5398a5affected · git
    • a1d75f258230b75d46aecdf28b2e732413028863 and later · before 3c0da3d163eb32f1f91891efaade027fa9b245b9affected · git
    • before 2.6.36not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.112-16.1.112-1
Debian:13linuxbefore 6.10.7-16.10.7-1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-defaultbefore 3.0.101-108.162.13.0.101-108.162.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-defaultbefore 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-ec2before 3.0.101-108.162.13.0.101-108.162.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-ec2before 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-sourcebefore 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-sourcebefore 3.0.101-108.162.13.0.101-108.162.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-symsbefore 3.0.101-108.162.13.0.101-108.162.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-symsbefore 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-tracebefore 3.0.101-108.162.13.0.101-108.162.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-tracebefore 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-xenbefore 3.0.101-108.168.13.0.101-108.168.1
SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREkernel-xenbefore 3.0.101-108.162.13.0.101-108.162.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-44945Aug 31, 2024 · netfilter: nfnetlink: Initialise extack before use in ACKs
    31Monitor
  • ← EarlierCVE-2024-44946Aug 31, 2024 · kcm: Serialise kcm_sendmsg() for the same socket.
    22Monitor
  • Later →CVE-2024-44949Sep 4, 2024 · parisc: fix a possible DMA corruption
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux18a067240817bee8a9360539af5d79a4bf5398a5Vendor (CNA)
Linux Linux33168db352c7b56ae18aa55c2cae1a1c5905d30eVendor (CNA)
Linux Linux3c0da3d163eb32f1f91891efaade027fa9b245b9Vendor (CNA)
Linux Linux4690e2171f651e2b415e3941ce17f2f7b813aff6Vendor (CNA)
Linux Linux49934861514d36d0995be8e81bb3312a499d8d9aVendor (CNA)
Linux Linux831433527773e665bdb635ab5783d0b95d1246f4Vendor (CNA)
Linux Linux8c78303eafbf85a728dd84d1750e89240c677dd9Vendor (CNA)
Linux Linuxac42e0f0eb66af966015ee33fd355bc6f5d80cd6Vendor (CNA)
debian:linux6.1.112-1 · Debian:12Package registry (OSV)
suse:kernel-default3.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-ec23.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-source3.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-syms3.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-trace3.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)
suse:kernel-xen3.0.101-108.162.1 · SUSE:Linux Enterprise Server 11 SP4 LTSS EXTREME COREPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02024-09-03

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoCsame day
  3. TodayNov 1, 2026+790 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2021-47194145 days apartcfg80211: call cfg80211_stop_ap when switch from P2P_GO type
    31Monitor
  • CVE-2023-52452193 days apartbpf: Fix accesses to uninit stack slots
    31Monitor
  • CVE-2024-450189 days apartnetfilter: flowtable: initialise extack before use
    22Monitor
  • CVE-2024-4669711 days apartnfsd: ensure that nfsd4_fattr_args.context is zeroed out
    22Monitor
  • CVE-2024-4207835 days apartnfsd: initialise nfsd_info.mutex early.
    22Monitor
  • CVE-2024-3948559 days apartmedia: v4l: async: Properly re-initialise notifier entry in unregister
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-665 · Improper Initialization

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records