VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98756: Linux kernel · usb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e5052f2c5c73c1dcca42bafc0bc737af2b2af059 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e5052f2c5c73c1dcca42bafc0bc737af2b2af059, dbdd0ca9a7eac140697a366f698a0e2bb02a06a1, d16046f1ace2691b6a946f022fe6dc215936880b +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < e5052f2c5c73c1dcca42bafc0bc737af2b2af059	Fixed in e5052f2c5c73c1dcca42bafc0bc737af2b2af059
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < dbdd0ca9a7eac140697a366f698a0e2bb02a06a1	Fixed in dbdd0ca9a7eac140697a366f698a0e2bb02a06a1
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < d16046f1ace2691b6a946f022fe6dc215936880b	Fixed in d16046f1ace2691b6a946f022fe6dc215936880b
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 549c04df02f1bb5a10342f32e2c87f5d27c97279	Fixed in 549c04df02f1bb5a10342f32e2c87f5d27c97279
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 45b606418bae73c7cde9f0e57e5b0977c816a7c0	Fixed in 45b606418bae73c7cde9f0e57e5b0977c816a7c0
LinuxLinux	Affected =5.4	Fixed in–

Description

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.

References

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