CVE-2026-98756usb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe The Cadence USBSS controller is a two-function PCI device. The first probed function allocates the driver data and stores it with pci_set_drvdata(), while the second function reuses it via pci_get_drvdata() when pci_is_enabled() reports that the first function has already been probed. When the second function is probed while the first one has been enabled but has not yet set its driver data, pci_get_drvdata() returns NULL, and the subsequent wrap->devfn assignment dereferences a NULL pointer and crashes the kernel. logs: Call trace: cdns3_pci_probe+0xa4/0x300 local_pci_probe+0x44/0xa8 pci_call_probe+0x54/0x158 pci_device_probe+0x84/0x100 really_probe+0x184/0x3d0 __driver_probe_device+0x80/0x178 driver_probe_device+0x44/0xe8 __driver_attach+0xec/0x1f8 bus_for_each_dev+0x7c/0xe0 driver_attach+0x28/0x38 bus_add_driver+0x110/0x238 driver_register+0x64/0x128 __pci_register_driver+0x50/0x60 cdns3_pci_driver_init+0x28/0x38 do_one_initcall+0x5c/0x280 do_initcalls+0x104/0x1d8 kernel_init_freeable+0x140/0x218 kernel_init+0x28/0x1f8 ret_from_fork+0x10/0x20 Return -EPROBE_DEFER in this case so that probing is retried after the first function has completed its probe.
- CVSS
- Not yet scored
- 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
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 7733f6c32e36ff9d7adadf40001039bf219b1cbe builds before 549c04df02f1bb5a10342f32e2c87f5d27c97279; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before d16046f1ace2691b6a946f022fe6dc215936880b; 7733f6c32e36ff9d7adadf40001039bf219b1cbe builds before 45b606418bae73c7cde9f0e57e5b0977c816a7c0; from 7733f6c32e36ff9d7adadf40001039bf219b1cbe before e5052f2c5c73c1dcca42bafc0bc737af2b2af059 | CNA record |
References
- https://git.kernel.org/stable/c/549c04df02f1bb5a10342f32e2c87f5d27c97279
- https://git.kernel.org/stable/c/d16046f1ace2691b6a946f022fe6dc215936880b
- https://git.kernel.org/stable/c/45b606418bae73c7cde9f0e57e5b0977c816a7c0
- https://git.kernel.org/stable/c/e5052f2c5c73c1dcca42bafc0bc737af2b2af059
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.