In the Linux kernel, the following vulnerability has been resolved:
net: netdevsim: don't try to destroy PHC on VFs
PHC gets initialized in nsim_init_netdevsim(), which is only called if (nsim_dev_port_is_pf()).
Create a counterpart of nsim_init_netdevsim() and move the mock_phc_destroy() there.
This fixes a crash trying to destroy netdevsim with VFs instantiated, as caught by running the devlink.sh test:
BUG: kernel NULL pointer dereference, address: 00000000000000b8 RIP: 0010:mock_phc_destroy+0xd/0x30 Call Trace: <TASK> nsim_destroy+0x4a/0x70 [netdevsim] __nsim_dev_port_del+0x47/0x70 [netdevsim] nsim_dev_reload_destroy+0x105/0x120 [netdevsim] nsim_drv_remove+0x2f/0xb0 [netdevsim] device_release_driver_internal+0x1a1/0x210 bus_remove_device+0xd5/0x120 device_del+0x159/0x490 device_unregister+0x12/0x30 del_device_store+0x11a/0x1a0 [netdevsim] kernfs_fop_write_iter+0x130/0x1d0 vfs_write+0x30b/0x4b0 ksys_write+0x69/0xf0 do_syscall_64+0xcc/0x1e0 entry_SYSCALL_64_after_hwframe+0x6f/0x77
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Oct 16, 2024 | Feb 22, 2024 |
| Suse | — | Upgrade kernel-develUpgrade kernel-defaultUpgrade reiserfs-kmp-defaultUpgrade kernel-docsUpgrade kernel-obs-buildUpgrade kernel-symsUpgrade kernel-default-develUpgrade kernel-sourceUpgrade kernel-64kb-develUpgrade kernel-macrosUpgrade kernel-zfcpdumpUpgrade kernel-64kb | Dec 5, 2025 | Dec 5, 2025 |
| Ubuntu | — | Upgrade linux-raspi-realtime | Feb 11, 2025 | Feb 22, 2024 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Feb 22, 2024 |
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