VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98757: Linux kernel · usb: cdns3: fix use-after-free in cdns3_gadget_exit()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in efdf0ddaed01161dc1c1f25382856f2fd1c1f44f : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 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 efdf0ddaed01161dc1c1f25382856f2fd1c1f44f, ebe9b68c396792c15d0ac690d592e449e74ed804, cc448700db656cceb4b411bf99a2e7132144d035 +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, < efdf0ddaed01161dc1c1f25382856f2fd1c1f44f	Fixed in efdf0ddaed01161dc1c1f25382856f2fd1c1f44f
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < ebe9b68c396792c15d0ac690d592e449e74ed804	Fixed in ebe9b68c396792c15d0ac690d592e449e74ed804
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < cc448700db656cceb4b411bf99a2e7132144d035	Fixed in cc448700db656cceb4b411bf99a2e7132144d035
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 95160fe606e685ff18de1e6ddcbc08289476004e	Fixed in 95160fe606e685ff18de1e6ddcbc08289476004e
LinuxLinux	Affected ≥ 7733f6c32e36ff9d7adadf40001039bf219b1cbe, < 159dada48ee2d53eff46e66a8011d67b2c209bbc	Fixed in 159dada48ee2d53eff46e66a8011d67b2c209bbc
LinuxLinux	Affected =5.4	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix use-after-free in cdns3_gadget_exit() cdns3_gadget_start() arms two works on system_freezable_wq: pending_status_wq for the deferred ep0 status stage and aligned_buf_wq for realigned request buffers. Both handlers use the cdns3_device the works are embedded in, and cdns3_pending_setup_status_handler() also calls the ep0 request completion. cdns3_gadget_exit() does not wait for these works. It frees all endpoints and aligned buffers and drops the last reference to the gadget device, which frees priv_dev, so a work queued before the exit can run after the free. Fix this by waiting for both works after the gadget driver is unbound and the IRQ is freed, when no new work can be queued, and before the endpoints and buffers are released. This issue was found by an in-house static analysis tool.

References

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