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NVD / CVE Program· CNA Linux

CVE-2025-39876: net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable()

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: 0.15% (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 03e79de4608bdd48ad6eec272e196124cefaf798, 20a3433d31c2d2bf70ab0abec75f3136b42ae66c, 4.20; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-1.

Low priority for now. Upgrade to Linux Linux 03e79de4608bdd48ad6eec272e196124cefaf798, 20a3433d31c2d2bf70ab0abec75f3136b42ae66c, 4.20; azl3 kernel 6.6.104.2-4 on Azure Linux 3.0 6.6.112.1-1 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: net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable() The function of_phy_find_device may return NULL, so we need to take care before dereferencing phy_dev.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 23, 2025
Updated
Oct 19, 2026
EPSS
0.1% · 4th 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 · 0.1%

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.

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When you'll hear from us

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  • 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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel5.4.73 and later · before 5.4.300
  • linux linux kernel5.8.17 and later · before 5.9
  • linux linux kernel5.9.2 and later · before 5.10.245
  • linux linux kernel5.11 and later · before 5.15.194
  • linux linux kernel4.19.153 and later · before 4.20
  • linux linux kernel6.2 and later · before 6.6.107
  • linux linux kernel6.7 and later · before 6.12.48
  • linux linux kernel6.13 and later · before 6.16.8
  • linux linux kernel5.16 and later · before 6.1.153
  • linux linux kernel6.17

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

    • c068e505f229ca5f778f825f1401817ce818e917, 8a6ab151443cd71e2aa5e8b7014e3453dbd51935, ce88b5f42868ef4964c497d4dfcd25e88fd60c5b, 5.10affected
    • 9e70485b40c8306298adea8bdc867ca27f88955a and later · before 8c60d12bba14dc655d2d948b1dbf390b3ae39cb8affected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before 20a3433d31c2d2bf70ab0abec75f3136b42ae66caffected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before 93a699d6e92cfdfa9eb9dbb8c653b5322542ca4faffected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before 5f1bb554a131e59b28482abad21f691390651752affected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before fe78891f296ac05bf4e5295c9829ef822f3c32e7affected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before 4fe53aaa4271a72fe5fe3e88a45ce01646b68dc5affected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before eb148d85e126c47d65be34f2a465d69432ca5541affected · git
    • 64a632da538a6827fad0ea461925cedb9899ebe2 and later · before 03e79de4608bdd48ad6eec272e196124cefaf798affected · git
    • 5.4.73 and later · before 5.4.300affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:11linuxbefore 5.10.247-15.10.247-1
Debian:12linuxbefore 6.1.153-16.1.153-1
Debian:13linuxbefore 6.12.48-16.12.48-1
Debian:14linuxbefore 6.16.8-16.16.8-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.6.1.160000.2.46.12.0-160000.6.1.160000.2.4
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.7.16.12.0-160000.7.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Enterprise Server 16.0kernel-symsbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.7.16.12.0-160000.7.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.6.1.160000.2.46.12.0-160000.6.1.160000.2.4

+3

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-2025-39874Sep 23, 2025 · macsec: sync features on RTM_NEWLINK
    22Monitor
  • ← EarlierCVE-2025-39875Sep 23, 2025 · igb: Fix NULL pointer dereference in ethtool loopback test
    22Monitor
  • Later →CVE-2025-39877Sep 23, 2025 · mm/damon/sysfs: fix use-after-free in state_show()
    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 Linux03e79de4608bdd48ad6eec272e196124cefaf798Vendor (CNA)
Linux Linux20a3433d31c2d2bf70ab0abec75f3136b42ae66cVendor (CNA)
Linux Linux4.20Vendor (CNA)
Linux Linux4fe53aaa4271a72fe5fe3e88a45ce01646b68dc5Vendor (CNA)
Linux Linux5.10Vendor (CNA)
Linux Linux5.4.300Vendor (CNA)
Linux Linux5.9Vendor (CNA)
Linux Linux5f1bb554a131e59b28482abad21f691390651752Vendor (CNA)
Linux Linux8c60d12bba14dc655d2d948b1dbf390b3ae39cb8Vendor (CNA)
Linux Linux93a699d6e92cfdfa9eb9dbb8c653b5322542ca4fVendor (CNA)
Linux Linuxeb148d85e126c47d65be34f2a465d69432ca5541Vendor (CNA)
Linux Linuxfe78891f296ac05bf4e5295c9829ef822f3c32e7Vendor (CNA)
azl3 kernel 6.6.104.2-4 on Azure Linux 3.06.6.112.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.153-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.6.1.160000.2.4 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-zfcpdump6.12.0-160000.7.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.7.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default6.12.0-160000.7.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.6.1.160000.2.4 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.7.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

+7

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.

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.

No nightly-computed relations.

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-476 · NULL Pointer Dereference

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. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records