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NVD / CVE Program· CNA Linux

CVE-2025-22044: acpi: nfit: fix narrowing conversion in acpi_nfit_ctl

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • 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 2ff0e408db36c21ed3fa5e3c1e0e687c82cf132f, 4b65cff06a004ac54f6ea8886060f0d07b1ca055, 73851cfceb00cc77d7a0851bc10f2263394c3e87; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1.

Low priority for now. Upgrade to Linux Linux 2ff0e408db36c21ed3fa5e3c1e0e687c82cf132f, 4b65cff06a004ac54f6ea8886060f0d07b1ca055, 73851cfceb00cc77d7a0851bc10f2263394c3e87; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; azl3 kernel 6.6.92.2-1 on Azure Linux 3.0 6.6.92.2-1 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: acpi: nfit: fix narrowing conversion in acpi_nfit_ctl Syzkaller has reported a warning in to_nfit_bus_uuid(): "only secondary bus families can be translated". This warning is emited if the argument is equal to NVDIMM_BUS_FAMILY_NFIT == 0. Function acpi_nfit_ctl() first verifies that a user-provided value call_pkg->nd_family of type u64 is not equal to 0. Then the value is converted to int, and only after that is compared to NVDIMM_BUS_FAMILY_MAX. This can lead to passing an invalid argument to acpi_nfit_ctl(), if call_pkg->nd_family is non-zero, while the lower 32 bits are zero. Furthermore, it is best to return EINVAL immediately upon seeing the invalid user input. The WARNING is insufficient to prevent further undefined behavior based on other invalid user input. All checks of the input value should be applied to the original variable call_pkg->nd_family. [iweiny: update commit message]

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 16, 2025
Updated
Oct 15, 2026
EPSS
0.2% · 11th 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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.1
1.6 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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

Follow CVE-2025-22044

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 kernel5.9 and later · before 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.134
  • linux linux kernel6.2 and later · before 6.6.87
  • linux linux kernel6.7 and later · before 6.12.23
  • linux linux kernel6.13 and later · before 6.13.11
  • linux linux kernel6.14 and later · before 6.14.2

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

    • 5.9affected
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before 4b65cff06a004ac54f6ea8886060f0d07b1ca055affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before 92ba06aef65522483784dcbd6697629ddbd4c4f9affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before bae5b55e0f327102e78f6a66fb127275e9bc91b6affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before c90402d2a226ff7afbe1d0650bee8ecc15a91049affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before e71a57c5aaa389d4c3c82f920761262efdd18d38affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before 73851cfceb00cc77d7a0851bc10f2263394c3e87affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before 85f11291658ab907c4294319c8102450cc75bb96affected · git
    • 6450ddbd5d8e83ea9927c7f9076a21f829699e0f and later · before 2ff0e408db36c21ed3fa5e3c1e0e687c82cf132faffected · git
    • before 5.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.135-16.1.135-1
Debian:13linuxbefore 6.12.25-16.12.25-1

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-2025-22025Apr 16, 2025 · nfsd: put dl_stid if fail to queue dl_recall
    22Monitor
  • ← EarlierCVE-2025-22037Apr 16, 2025 · ksmbd: fix null pointer dereference in alloc_preauth_hash()
    51Plan
  • Later →CVE-2025-22045Apr 16, 2025 · x86/mm: Fix flush_tlb_range() when used for zapping normal PMDs
    22Monitor

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 Linux2ff0e408db36c21ed3fa5e3c1e0e687c82cf132fVendor (CNA)
Linux Linux4b65cff06a004ac54f6ea8886060f0d07b1ca055Vendor (CNA)
Linux Linux73851cfceb00cc77d7a0851bc10f2263394c3e87Vendor (CNA)
Linux Linux85f11291658ab907c4294319c8102450cc75bb96Vendor (CNA)
Linux Linux92ba06aef65522483784dcbd6697629ddbd4c4f9Vendor (CNA)
Linux Linuxbae5b55e0f327102e78f6a66fb127275e9bc91b6Vendor (CNA)
Linux Linuxc90402d2a226ff7afbe1d0650bee8ecc15a91049Vendor (CNA)
Linux Linuxe71a57c5aaa389d4c3c82f920761262efdd18d38Vendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.92.2-1 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.135-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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-2025-39880160 days apartlibceph: fix invalid accesses to ceph_connection_v1_info
    31Monitor
  • CVE-2022-4987315 days apartbpf: Fix wrong reg type conversion in release_reference()
    22Monitor
  • CVE-2025-3774615 days apartperf/dwc_pcie: fix duplicate pci_dev devices
    22Monitor
  • CVE-2024-5783995 days apartRevert "readahead: properly shorten readahead when falling back to do_page_cache_ra()"
    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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-704 · Incorrect Type Conversion or Cast

CVSS vector

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

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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records