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CVE.org (no NVD analysis yet)· CNA Linux

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

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 399b18b18f54495eeeda8d88e039e6af27d020c9, 45b606418bae73c7cde9f0e57e5b0977c816a7c0, 549c04df02f1bb5a10342f32e2c87f5d27c97279; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 399b18b18f54495eeeda8d88e039e6af27d020c9, 45b606418bae73c7cde9f0e57e5b0977c816a7c0, 549c04df02f1bb5a10342f32e2c87f5d27c97279; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.4affected
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 399b18b18f54495eeeda8d88e039e6af27d020c9affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 88b473800ae11397e2e169aff2e17b041c040409affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before fc13243658da9ed3c4c94aaff77c36a10f441b89affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before dbdd0ca9a7eac140697a366f698a0e2bb02a06a1affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 549c04df02f1bb5a10342f32e2c87f5d27c97279affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before d16046f1ace2691b6a946f022fe6dc215936880baffected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before 45b606418bae73c7cde9f0e57e5b0977c816a7c0affected · git
    • 7733f6c32e36ff9d7adadf40001039bf219b1cbe and later · before e5052f2c5c73c1dcca42bafc0bc737af2b2af059affected · git
    • before 5.4not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98754Oct 18, 2026 · tty: vcc: hold port lock when clearing tty pointer in vcc_cleanup
    0Monitor
  • ← EarlierCVE-2026-98755Oct 18, 2026 · tty: vcc: zero-initialize control packet in vcc_send_ctl()
    0Monitor
  • Later →CVE-2026-98757Oct 18, 2026 · usb: cdns3: fix use-after-free in cdns3_gadget_exit()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux399b18b18f54495eeeda8d88e039e6af27d020c9Vendor (CNA)
Linux Linux45b606418bae73c7cde9f0e57e5b0977c816a7c0Vendor (CNA)
Linux Linux549c04df02f1bb5a10342f32e2c87f5d27c97279Vendor (CNA)
Linux Linux88b473800ae11397e2e169aff2e17b041c040409Vendor (CNA)
Linux Linuxd16046f1ace2691b6a946f022fe6dc215936880bVendor (CNA)
Linux Linuxdbdd0ca9a7eac140697a366f698a0e2bb02a06a1Vendor (CNA)
Linux Linuxe5052f2c5c73c1dcca42bafc0bc737af2b2af059Vendor (CNA)
Linux Linuxfc13243658da9ed3c4c94aaff77c36a10f441b89Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records