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 Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux-6.1Upgrade linux | May 3, 2026 | May 3, 2026 |
| Ubuntu | — | Upgrade linux-image-ibm-lts-24.04Upgrade linux-image-gcp-fips-6.8Upgrade linux-image-gcp-lts-24.04Upgrade linux-image-oracle-lts-22.04Upgrade linux-image-virtual-hwe-20.04Upgrade linux-image-5.15.0-1095-gkeopUpgrade linux-image-5.15.0-184-lowlatency-64kUpgrade linux-image-6.8.0-1059-nvidia-lowlatency-64kUpgrade linux-image-oracle-64k-lts-24.04Upgrade linux-image-5.15.0-1053-nvidia-tegra-igx-rtUpgrade linux-image-generic-64k-hwe-22.04Upgrade linux-image-aws-64kUpgrade linux-image-lowlatency-64k-5.15Upgrade linux-image-nvidia-tegra-rt-5.15Upgrade linux-image-oem-22.04bUpgrade linux-image-azure-5.15Upgrade linux-image-5.15.0-1112-aws-64kUpgrade linux-image-5.15.0-1117-azureUpgrade linux-image-5.15.0-1109-oracleUpgrade linux-image-aws-lts-24.04Upgrade linux-image-5.15.0-1053-nvidia-tegra-igxUpgrade linux-image-5.15.0-1064-nvidia-tegraUpgrade linux-image-intel-iot-realtime-5.15Upgrade linux-image-azure-fde-lts-24.04Upgrade linux-image-oracle-6.8Upgrade linux-image-6.8.0-1058-oracleUpgrade linux-image-oracle-5.15Upgrade linux-image-azure-cvmUpgrade linux-image-5.15.0-186-genericUpgrade linux-image-xilinxUpgrade linux-image-gcp-64kUpgrade linux-image-realtime-5.15Upgrade linux-image-azure-6.8Upgrade linux-image-realtimeUpgrade linux-image-aws-64k-lts-24.04Upgrade linux-image-realtime-6.8.1Upgrade linux-image-awsUpgrade linux-image-xilinx-zynqmp-5.15Upgrade linux-image-virtual-hwe-22.04Upgrade linux-image-ibm-6.8Upgrade linux-image-5.15.0-1112-awsUpgrade linux-image-generic-hwe-20.04Upgrade linux-image-xilinx-6.8Upgrade linux-image-kvmUpgrade linux-image-azure-fips-6.8Upgrade linux-image-fips-5.15Upgrade linux-image-virtual-5.15Upgrade linux-image-6.8.0-1059-nvidiaUpgrade linux-image-6.8.0-136-generic-64kUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-1061-aws-64kUpgrade linux-image-gcp-fipsUpgrade linux-image-5.15.0-1117-azure-fipsUpgrade linux-image-5.15.0-184-lowlatencyUpgrade linux-image-generic-64k-6.8Upgrade linux-image-6.8.0-1061-ibmUpgrade linux-image-generic-lpae-hwe-20.04Upgrade linux-image-gke-6.8Upgrade linux-image-generic-hwe-22.04Upgrade linux-image-oem-20.04cUpgrade linux-image-azure-fde-6.8Upgrade linux-image-aws-64k-6.8Upgrade linux-image-aws-6.8Upgrade linux-image-oem-22.04dUpgrade linux-image-5.15.0-1108-gkeUpgrade linux-image-5.15.0-186-generic-64kUpgrade linux-image-5.15.0-1104-intel-iot-realtimeUpgrade linux-image-6.8.0-1061-aws-fipsUpgrade linux-image-6.8.0-1062-azure-fdeUpgrade linux-image-virtual-6.8Upgrade linux-image-6.8.0-1064-gcpUpgrade linux-image-intel-iot-realtimeUpgrade linux-image-aws-5.15Upgrade linux-image-fips-6.8Upgrade linux-image-azure-fde-lts-22.04Upgrade linux-image-laptop-23.10Upgrade linux-image-6.8.0-1030-nvidia-tegraUpgrade linux-image-6.8.0-136-genericUpgrade linux-image-nvidia-tegra-igxUpgrade linux-image-nvidia-tegra-rt-6.8Upgrade linux-image-gkeop-5.15Upgrade linux-image-5.15.0-1064-nvidia-tegra-rtUpgrade linux-image-azureUpgrade linux-image-azure-fipsUpgrade linux-image-5.15.0-1107-intel-iotgUpgrade linux-image-5.15.0-186-fipsUpgrade linux-image-aws-fips-6.8Upgrade linux-image-nvidia-hwe-22.04Upgrade linux-image-oem-20.04dUpgrade linux-image-oracle-64kUpgrade linux-image-nvidia-5.15Upgrade linux-image-nvidia-64kUpgrade linux-image-oem-22.04cUpgrade linux-image-gke-64k-6.8Upgrade linux-image-lowlatency-64k-6.8Upgrade linux-image-generic-6.8Upgrade linux-image-realtime-hwe-22.04Upgrade linux-image-gcp-64k-6.8Upgrade linux-image-nvidia-lowlatency-64k-6.8Upgrade linux-image-gcpUpgrade linux-image-lowlatency-64k-hwe-22.04Upgrade linux-image-aws-64k-lts-22.04Upgrade linux-image-gcp-5.15Upgrade linux-image-6.8.0-1059-gke-64kUpgrade linux-image-6.8.0-1063-azureUpgrade linux-image-6.8.0-1063-azure-fipsUpgrade linux-image-gcp-6.8Upgrade linux-image-intelUpgrade linux-image-5.15.0-1075-xilinx-zynqmpUpgrade linux-image-intel-iotgUpgrade linux-image-ibm-5.15Upgrade linux-image-gke-64kUpgrade linux-image-gkeUpgrade linux-image-nvidia-tegra-igx-rtUpgrade linux-image-6.8.0-136-lowlatency-64kUpgrade linux-image-5.15.0-1112-gcpUpgrade linux-image-oracleUpgrade linux-image-nvidia-tegra-6.8Upgrade linux-image-nvidia-tegraUpgrade linux-image-kvm-5.15Upgrade linux-image-generic-64k-hwe-20.04Upgrade linux-image-6.8.0-136-lowlatencyUpgrade linux-image-nvidia-lowlatencyUpgrade linux-image-lowlatency-5.15Upgrade linux-image-gkeop-6.8Upgrade linux-image-gcp-lts-22.04Upgrade linux-image-virtualUpgrade linux-image-oracle-lts-24.04Upgrade linux-image-lowlatency-hwe-20.04Upgrade linux-image-oem-20.04bUpgrade linux-image-generic-64k-5.15Upgrade linux-image-azure-fde-5.15Upgrade linux-image-6.8.0-1059-gkeUpgrade linux-image-aws-fipsUpgrade linux-image-6.8.0-1030-nvidia-tegra-rtUpgrade linux-image-gcp-fips-5.15Upgrade linux-image-generic-5.15Upgrade linux-image-fipsUpgrade linux-image-aws-fips-5.15Upgrade linux-image-aws-64k-5.15Upgrade linux-image-6.8.0-136-fipsUpgrade linux-image-6.8.0-1059-nvidia-64kUpgrade linux-image-6.8.0-1058-oracle-64kUpgrade linux-image-oem-20.04Upgrade linux-image-nvidia-tegra-rtUpgrade linux-image-nvidia-tegra-igx-rt-5.15Upgrade linux-image-ibm-classicUpgrade linux-image-5.15.0-1117-azure-fdeUpgrade linux-image-nvidiaUpgrade linux-image-aws-lts-22.04Upgrade linux-image-5.15.0-1107-nvidiaUpgrade linux-image-5.15.0-1106-ibmUpgrade linux-image-nvidia-tegra-igx-5.15Upgrade linux-image-nvidia-lowlatency-5.15Upgrade linux-image-lowlatency-hwe-22.04Upgrade linux-image-generic-64kUpgrade linux-image-gcp-64k-lts-24.04Upgrade linux-image-6.8.0-1064-gcp-64kUpgrade linux-image-lowlatency-64k-hwe-20.04Upgrade linux-image-5.15.0-1104-kvmUpgrade linux-image-xilinx-zynqmpUpgrade linux-image-nvidia-tegra-5.15Upgrade linux-image-lowlatency-64kUpgrade linux-image-lowlatency-6.8Upgrade linux-image-genericUpgrade linux-image-nvidia-64k-hwe-22.04Upgrade linux-image-azure-lts-22.04Upgrade linux-image-intel-iotg-5.15Upgrade linux-image-gke-5.15Upgrade linux-image-5.15.0-186-generic-lpaeUpgrade linux-image-5.15.0-1111-realtimeUpgrade linux-image-5.15.0-1112-gcp-fipsUpgrade linux-image-ibmUpgrade linux-image-generic-lpae-5.15Upgrade linux-image-nvidia-6.8Upgrade linux-image-gkeopUpgrade linux-image-5.15.0-1107-nvidia-lowlatencyUpgrade linux-image-azure-fips-5.15Upgrade linux-image-oem-22.04Upgrade linux-image-generic-lpaeUpgrade linux-image-azure-lts-24.04Upgrade linux-image-5.15.0-1112-aws-fipsUpgrade linux-image-6.8.0-1046-gkeopUpgrade linux-image-oracle-64k-6.8Upgrade linux-image-oem-22.04aUpgrade linux-image-6.8.0-1061-awsUpgrade linux-image-6.8.1-1056-realtimeUpgrade linux-image-lowlatencyUpgrade linux-image-nvidia-lowlatency-6.8Upgrade linux-image-6.8.0-1059-nvidia-lowlatencyUpgrade linux-image-nvidia-lowlatency-64kUpgrade linux-image-6.8.0-1033-xilinxUpgrade linux-image-6.8.0-1064-gcp-fipsUpgrade linux-image-nvidia-64k-6.8 | May 25, 2026 | May 1, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub