VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98757

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

Data as of 26 Oct 2026, 14:05 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 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.

ghsa-cfx2-v35h-c74w

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–

AI-suggested

A fix is available that waits for all deferred work to complete before freeing resources in the cdns3 driver. Users should apply the official Linux kernel updates that include this patch. Since this is a kernel-level issue, updating to a patched kernel version is the recommended remediation.

Description

A use-after-free vulnerability in the Linux kernel's usb cdns3 driver was resolved. The flaw involved cdns3_gadget_exit() not properly waiting for deferred work to complete before freeing resources, potentially allowing use of freed memory. The fix ensures that all queued work completes before releasing endpoints and buffers. This vulnerability was identified via static analysis and has no known exploits in the wild.

References

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