High 7.8Published May 1, 2026

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

Updated under an hour ago (Oct 27, 2026, 1:23 AM ET)

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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

CVSS: 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 7721221e87d25c9840d9ca6b986dbdc410d5ce2b before bf64cae913cdd4821f13d5d1d68900c0891bef69; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before 67f70841a175fa3469119f52d77a3662c07507a2; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before 2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before b3f799cdf830df1782ae463cf15ace35015be99e; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before f310a836da90d0f0321b14d446c071af63f9ee4c; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before 16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before 3496fb9e66f79d4def3bb7ec7563e3eaa33a688f; from d82d5303c4c539db86588ffb5dc5b26c3f1513e8 before ce8fe5287b87e24e225c342f3b0ec04f0b3680fe; and 9 more ranges	CNA record
linux linux_kernel linux:linux_kernel	from 4.14.249 before 4.15; from 4.19.209 before 4.20; from 5.4.150 before 5.5; from 5.10.70 before 5.10.253; from 5.14.9 before 5.15; from 5.15.1 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.134; and 16 more ranges	NVD

References

References

https://git.kernel.org/stable/c/bf64cae913cdd4821f13d5d1d68900c0891bef69	patch
https://git.kernel.org/stable/c/67f70841a175fa3469119f52d77a3662c07507a2	patch
https://git.kernel.org/stable/c/2d96204e4184d6f7dd2f93c6f218fd0c1f55e9ae	patch
https://git.kernel.org/stable/c/b3f799cdf830df1782ae463cf15ace35015be99e	patch
https://git.kernel.org/stable/c/f310a836da90d0f0321b14d446c071af63f9ee4c	patch
https://git.kernel.org/stable/c/16ab4c0e2b15df5d33bfcb9ea8e4441b85dd4a57	patch
https://git.kernel.org/stable/c/3496fb9e66f79d4def3bb7ec7563e3eaa33a688f	patch
https://git.kernel.org/stable/c/ce8fe5287b87e24e225c342f3b0ec04f0b3680fe	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.