CVE-2026-98756
Status: ReceivedUnscored—
Severity—Unscored
Exploitation probability0.17 %higher than 6% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found
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.
Return -EPROBE_DEFER in this case so that probing is retried after the first function has completed its probe.
Technical details traces, logs and code from the original report
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
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.17 %
- Percentile among all scored CVEs
- 6
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Show 4 references
Raw JSON (NVD)
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{
"id": "CVE-2026-98756",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
"lessThan": "549c04df02f1bb5a10342f32e2c87f5d27c97279",
"versionType": "git"
},
{
"status": "affected",
"version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
"lessThan": "d16046f1ace2691b6a946f022fe6dc215936880b",
"versionType": "git"
},
{
"status": "affected",
"version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
"lessThan": "45b606418bae73c7cde9f0e57e5b0977c816a7c0",
"versionType": "git"
},
{
"status": "affected",
"version": "7733f6c32e36ff9d7adadf40001039bf219b1cbe",
"lessThan": "e5052f2c5c73c1dcca42bafc0bc737af2b2af059",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/cdns3/cdns3-pci-wrap.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/cdns3/cdns3-pci-wrap.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:29.397",
"references": [
{
"url": "https://git.kernel.org/stable/c/45b606418bae73c7cde9f0e57e5b0977c816a7c0",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/549c04df02f1bb5a10342f32e2c87f5d27c97279",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d16046f1ace2691b6a946f022fe6dc215936880b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e5052f2c5c73c1dcca42bafc0bc737af2b2af059",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: cdns3: Fix NULL pointer dereference in cdns3_pci_probe\n\nThe Cadence USBSS controller is a two-function PCI device. The first\nprobed function allocates the driver data and stores it with\npci_set_drvdata(), while the second function reuses it via\npci_get_drvdata() when pci_is_enabled() reports that the first\nfunction has already been probed.\n\nWhen the second function is probed while the first one has been\nenabled but has not yet set its driver data, pci_get_drvdata()\nreturns NULL, and the subsequent wrap->devfn assignment dereferences\na NULL pointer and crashes the kernel.\nlogs:\nCall trace:\n cdns3_pci_probe+0xa4/0x300\n local_pci_probe+0x44/0xa8\n pci_call_probe+0x54/0x158\n pci_device_probe+0x84/0x100\n really_probe+0x184/0x3d0\n __driver_probe_device+0x80/0x178\n driver_probe_device+0x44/0xe8\n __driver_attach+0xec/0x1f8\n bus_for_each_dev+0x7c/0xe0\n driver_attach+0x28/0x38\n bus_add_driver+0x110/0x238\n driver_register+0x64/0x128\n __pci_register_driver+0x50/0x60\n cdns3_pci_driver_init+0x28/0x38\n do_one_initcall+0x5c/0x280\n do_initcalls+0x104/0x1d8\n kernel_init_freeable+0x140/0x218\n kernel_init+0x28/0x1f8\n ret_from_fork+0x10/0x20\n\nReturn -EPROBE_DEFER in this case so that probing is retried after\nthe first function has completed its probe."
}
],
"lastModified": "2026-10-19T10:19:39.727",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}