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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98765

USB: gadget: dummy-hcd: Fix wait for outstanding request completions

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: USB: gadget: dummy-hcd: Fix wait for outstanding request completions The dummy-hcd driver emulates synchronize_irq() by waiting until its private callback_usage counter drops to 0 (with the private lock not held). This counter is incremented whenever a gadget driver callback occurs (which requires the private lock to be dropped), but not when a request completion handler is called. This is an oversight. Request completion is triggered by timer interrupts (emulating device IRQs in a real UDC), and the interrupt handlers are supposed to have completed when the synchronize_irq() emulation routine returns -- they aren't supposed to be in the middle of a completion callback. If this happens it can lead to a gadget driver's unbind routine running before all outstanding request completions have finished, maybe even allowing the gadget driver's module to be unloaded while a completion handler is still running. Fix the oversight by incrementing the callback_usage value across request completion callbacks.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 32721319e89a2be610b0518b88f0d188ce878063affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 48ef54100ceffbd1a055f193873574c45f408eb5affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < d77cc7c0d739fb17413714c5c4914bd396502e20affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 6849e51b89de5b6fc7447dc8e612b58df19c7deaaffected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 5298c96bf0068f3160969f7ddad81976d01a9b66affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < 3070806a7bc7bb36ed04a21022c09dafcc5619f4affected
  • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 to < b263ff9b0fc5c1f371d65c4eb196b31263d039ffaffected
  • 7b416b9dac6ede26d4ca0c1a88b448b543623ff3affected
  • 8590bc1da625dd4a589eac0fc3aa3cf4f400424daffected
  • a867d5b932ac4911d3f8a1e63505061b0c81f889affected
  • e84b4a008365b7edbd842a063ae28d040a98db25affected
  • e39b17143a5b5aac81f066d455e5d3a9877eb3aeaffected
  • 4f8ae1fcb0dfbb72a7678f81bf01fb7fc85c6715affected
  • 3.2.97 to < 3.3affected
  • 3.16.52 to < 3.17affected
  • 4.1.46 to < 4.2affected
  • 4.4.92 to < 4.5affected
  • 4.9.55 to < 4.10affected
  • 4.13.6 to < 4.14affected

Linux Linux

Default version status: affected

  • 4.14affected
  • 0 to < 4.14unaffected
  • 5.10.273 to ≤ 5.10.*unaffected
  • 5.15.224 to ≤ 5.15.*unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.113 to ≤ 6.12.*unaffected
  • 6.18.56 to ≤ 6.18.*unaffected
  • 7.2.10 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References