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NVD / CVE Program· CNA Linux

CVE-2026-43014: net: macb: properly unregister fixed rate clocks

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: 0.12% (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 015aa24d3721a05b40935b8af78b49cadf616b8d, 5392a5174df4f5a2fad2f00e8c617394d0efe031, 54c6f0e7682433abed0304ac2f5cb71a92d4b366.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 015aa24d3721a05b40935b8af78b49cadf616b8d, 5392a5174df4f5a2fad2f00e8c617394d0efe031, 54c6f0e7682433abed0304ac2f5cb71a92d4b366 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: macb: properly unregister fixed rate clocks The additional resources allocated with clk_register_fixed_rate() need to be released with clk_unregister_fixed_rate(), otherwise they are lost.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 1, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 2th percentile
CWE
—

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.

Follow CVE-2026-43014

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 kernel4.10 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 5.15.203
  • linux linux kernel5.16 and later · before 6.1.168
  • linux linux kernel6.2 and later · before 6.6.134
  • linux linux kernel6.7 and later · before 6.12.81
  • linux linux kernel6.13 and later · before 6.18.22
  • linux linux kernel6.19 and later · before 6.19.12
  • linux linux kernel7.0

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

    • 4.10affected
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before 54c6f0e7682433abed0304ac2f5cb71a92d4b366affected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before 015aa24d3721a05b40935b8af78b49cadf616b8daffected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before ec1be2ce0d94506f11b22066fd6dc5eb4341b14faffected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before e1f6f47d6e60d51c3294e5b85787e9aee24c450eaffected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before e35dbfdb1b7710f04ff5c9972ea04971d823a22daffected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before 5392a5174df4f5a2fad2f00e8c617394d0efe031affected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before 6ec567425c057fd850651ee09b31d059ef960e0faffected · git
    • 83a77e9ec4150ee4acc635638f7dedd9da523a26 and later · before f0f367a4f459cc8118aadc43c6bba53c60d93f8daffected · git
    • before 4.10not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.12-16.19.12-1

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-2026-43012May 1, 2026 · net/mlx5: Fix switchdev mode rollback in case of failure
    22Monitor
  • ← EarlierCVE-2026-43013May 1, 2026 · net/mlx5: lag: Check for LAG device before creating debugfs
    22Monitor
  • Later →CVE-2026-43015May 1, 2026 · net: macb: fix clk handling on PCI glue driver removal
    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 Linux015aa24d3721a05b40935b8af78b49cadf616b8dVendor (CNA)
Linux Linux5392a5174df4f5a2fad2f00e8c617394d0efe031Vendor (CNA)
Linux Linux54c6f0e7682433abed0304ac2f5cb71a92d4b366Vendor (CNA)
Linux Linux6ec567425c057fd850651ee09b31d059ef960e0fVendor (CNA)
Linux Linuxe1f6f47d6e60d51c3294e5b85787e9aee24c450eVendor (CNA)
Linux Linuxe35dbfdb1b7710f04ff5c9972ea04971d823a22dVendor (CNA)
Linux Linuxec1be2ce0d94506f11b22066fd6dc5eb4341b14fVendor (CNA)
Linux Linuxf0f367a4f459cc8118aadc43c6bba53c60d93f8dVendor (CNA)
debian:linux6.1.170-1 · 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.

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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)

—

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 (7 more)

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

All records