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CVE-2026-98757

Linux: usb: cdns3: fix use-after-free in cdns3_gadget_exit()

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in95160fe606e685ff18de1e6ddcbc08289476004eAlso 159dada48ee2d53eff46e66a8011d67b2c209bbcCVE List
Published18 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

  • 95160fe606e685ff18de1e6ddcbc08289476004eLinuxCVE List
  • 159dada48ee2d53eff46e66a8011d67b2c209bbcLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 12

  • Linuxaffected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe before efdf0ddaed01161dc1c1f25382856f2fd1c1f44fCVE List
  • Linuxaffected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe before cc448700db656cceb4b411bf99a2e7132144d035CVE List
  • Linuxaffected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe before 95160fe606e685ff18de1e6ddcbc08289476004eCVE List
  • Linuxaffected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe before 159dada48ee2d53eff46e66a8011d67b2c209bbcCVE List
  • Linuxaffected: 7733f6c32e36ff9d7adadf40001039bf219b1cbe before ebe9b68c396792c15d0ac690d592e449e74ed804CVE List
  • Linuxaffected: 5.4CVE List
  • Linuxunaffected: all versions before 5.4CVE List
  • Linuxunaffected: 6.6.160 through 6.6.*CVE List
  • Linuxunaffected: 6.12.113 through 6.12.*CVE List
  • Linuxunaffected: 6.18.56 through 6.18.*CVE List
  • Linuxunaffected: 7.2.10 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 5