VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98756

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

Data as of 26 Oct 2026, 12:55 UTC

Severity

Medium

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.

ghsa-r25x-m228-w665

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–

AI-suggested

A fix has been implemented in the Linux kernel to return -EPROBE_DEFER when the second function probes before the first function has set its driver data, preventing the NULL pointer dereference. Users should update to a kernel version that includes this fix. Patch status is not explicitly confirmed in the input; check the vendor advisory or Linux kernel changelogs for the exact fixed version.

Description

A NULL pointer dereference vulnerability in the Linux kernel's Cadence USBSS controller driver (cdns3) was resolved. The issue occurs during PCI device probing when the second function probes before the first function has set its driver data, causing a kernel crash. The fix involves returning -EPROBE_DEFER to retry probing after the first function completes.

References

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