NVD / CVE Program· CNA Linux

CVE-2026-43015: net: macb: fix clk handling on PCI glue driver removal

Noroxi assessment

Priority: Monitor (action score 31/100)

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 16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57, 2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae, 3496fb9e66f79d4def3bb7ec7563e3eaa33a688f.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57, 2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae, 3496fb9e66f79d4def3bb7ec7563e3eaa33a688f 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: fix clk handling on PCI glue driver removal platform_device_unregister() may still want to use the registered clks during runtime resume callback. Note that there is a commit d82d5303c4c5 ("net: macb: fix use after free on rmmod") that addressed the similar problem of clk vs platform device unregistration but just moved the bug to another place. Save the pointers to clks into local variables for reuse after platform device is unregistered. BUG: KASAN: use-after-free in clk_prepare+0x5a/0x60 Read of size 8 at addr ffff888104f85e00 by task modprobe/597 CPU: 2 PID: 597 Comm: modprobe Not tainted 6.1.164+ #114 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x8d/0xba print_report+0x17f/0x496 kasan_report+0xd9/0x180 clk_prepare+0x5a/0x60 macb_runtime_resume+0x13d/0x410 [macb] pm_generic_runtime_resume+0x97/0xd0 __rpm_callback+0xc8/0x4d0 rpm_callback+0xf6/0x230 rpm_resume+0xeeb/0x1a70 __pm_runtime_resume+0xb4/0x170 bus_remove_device+0x2e3/0x4b0 device_del+0x5b3/0xdc0 platform_device_del+0x4e/0x280 platform_device_unregister+0x11/0x50 pci_device_remove+0xae/0x210 device_remove+0xcb/0x180 device_release_driver_internal+0x529/0x770 driver_detach+0xd4/0x1a0 bus_remove_driver+0x135/0x260 driver_unregister+0x72/0xb0 pci_unregister_driver+0x26/0x220 __do_sys_delete_module+0x32e/0x550 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 </TASK> Allocated by task 519: kasan_save_stack+0x2c/0x50 kasan_set_track+0x21/0x30 __kasan_kmalloc+0x8e/0x90 __clk_register+0x458/0x2890 clk_hw_register+0x1a/0x60 __clk_hw_register_fixed_rate+0x255/0x410 clk_register_fixed_rate+0x3c/0xa0 macb_probe+0x1d8/0x42e [macb_pci] local_pci_probe+0xd7/0x190 pci_device_probe+0x252/0x600 really_probe+0x255/0x7f0 __driver_probe_device+0x1ee/0x330 driver_probe_device+0x4c/0x1f0 __driver_attach+0x1df/0x4e0 bus_for_each_dev+0x15d/0x1f0 bus_add_driver+0x486/0x5e0 driver_register+0x23a/0x3d0 do_one_initcall+0xfd/0x4d0 do_init_module+0x18b/0x5a0 load_module+0x5663/0x7950 __do_sys_finit_module+0x101/0x180 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 597: kasan_save_stack+0x2c/0x50 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x50 __kasan_slab_free+0x106/0x180 __kmem_cache_free+0xbc/0x320 clk_unregister+0x6de/0x8d0 macb_remove+0x73/0xc0 [macb_pci] pci_device_remove+0xae/0x210 device_remove+0xcb/0x180 device_release_driver_internal+0x529/0x770 driver_detach+0xd4/0x1a0 bus_remove_driver+0x135/0x260 driver_unregister+0x72/0xb0 pci_unregister_driver+0x26/0x220 __do_sys_delete_module+0x32e/0x550 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x6e/0xd8

HighCVSS 7.8 · v3.1—No exploit Fix available

Memory safety

BDU:2026-06511

Published: May 1, 2026
Updated: Jun 17, 2026
EPSS: 0.1% · 2th percentile
CWE: CWE-416

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 31 / 40 · 7.8 / 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

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel4.14.249 and later · before 4.15
linux linux kernel4.19.209 and later · before 4.20
linux linux kernel5.4.150 and later · before 5.5
linux linux kernel5.10.70 and later · before 5.10.253
linux linux kernel5.14.9 and later · before 5.15
linux linux kernel5.15.1 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 kernel5.15
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
- a7d521cc726f30b8e679a6f36d04b18a8ab3c536, 46670fb832ee80943715df618632ca13c2e96f2b, 1da750d1e2140ef43d64d17f301ff6f41b45541e, 4ad6f2d23b0f6ac0d3e5f3102a4256d1c86c90f5, 5.15affected
- 7721221e87d25c9840d9ca6b986dbdc410d5ce2b and later · before bf64cae913cdd4821f13d5d1d68900c0891bef69affected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before 67f70841a175fa3469119f52d77a3662c07507a2affected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before 2d96204e4184d6f7dd2f93c6f218fd0c1f55e9aeaffected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before b3f799cdf830df1782ae463cf15ace35015be99eaffected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before f310a836da90d0f0321b14d446c071af63f9ee4caffected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before 16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57affected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before 3496fb9e66f79d4def3bb7ec7563e3eaa33a688faffected · git
- d82d5303c4c539db86588ffb5dc5b26c3f1513e8 and later · before ce8fe5287b87e24e225c342f3b0ec04f0b3680feaffected · git
- 5.10.70 and later · before 5.10.253affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.170-1	6.1.170-1
Debian:13	linux	before 6.12.85-1	6.12.85-1
Debian:14	linux	before 6.19.12-1	6.19.12-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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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
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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-2026-43008May 1, 2026 · gpio: qixis-fpga: Fix error handling for devm_regmap_init_mmio()
22Monitor
← EarlierCVE-2026-43014May 1, 2026 · net: macb: properly unregister fixed rate clocks
22Monitor
Later →CVE-2026-43029May 1, 2026 · mptcp: fix soft lockup in mptcp_recvmsg()
30Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
Linux Linux	16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57	Vendor (CNA)
Linux Linux	2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae	Vendor (CNA)
Linux Linux	3496fb9e66f79d4def3bb7ec7563e3eaa33a688f	Vendor (CNA)
Linux Linux	4.15	Vendor (CNA)
Linux Linux	4.20	Vendor (CNA)
Linux Linux	5.10.253	Vendor (CNA)
Linux Linux	5.15	Vendor (CNA)
Linux Linux	5.5	Vendor (CNA)
Linux Linux	67f70841a175fa3469119f52d77a3662c07507a2	Vendor (CNA)
Linux Linux	b3f799cdf830df1782ae463cf15ace35015be99e	Vendor (CNA)
Linux Linux	bf64cae913cdd4821f13d5d1d68900c0891bef69	Vendor (CNA)
Linux Linux	ce8fe5287b87e24e225c342f3b0ec04f0b3680fe	Vendor (CNA)
Linux Linux	f310a836da90d0f0321b14d446c071af63f9ee4c	Vendor (CNA)
debian:linux	6.1.170-1 · Debian:12	Package 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.

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

TR-26-0143 · May 4, 2026(Linux Kernel Güvenlik Bildirimi)

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: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

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

References

git.kernel.org/stable/c/16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57

Show all references (7 more)

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

All records