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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-98767

usb: dwc3: gadget: fix IRQ storm on invalid event buffer count

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: gadget: fix IRQ storm on invalid event buffer count When dwc3_check_event_buf() reads a GEVNTCOUNT value exceeding the event buffer length, commit 63ccd26cd1f6 ("usb: dwc3: gadget: check that event count does not exceed event buffer length") returns IRQ_NONE without writing back GEVNTCOUNT. Since the DWC3 interrupt is level-triggered, the uncleared IRQ source keeps the line asserted, causing a tight IRQ storm that accumulates 99,900 unhandled interrupts and triggers spurious.c:184 BUG -> kernel panic. The resulting call stack: __report_bad_irq+0xac/0xc8 note_interrupt+0x340/0x468 handle_irq_event+0xac/0xc0 handle_fasteoi_irq+0x120/0x228 gic_handle_irq+0x68/0x108 ... kernel BUG at kernel/irq/spurious.c:184 To reproduce, write a bogus value exceeding the event buffer length directly to the GEVNTCOUNT register: devmem <DWC3_BASE + 0xc40c> 4 0x1004 Write the bogus count back to GEVNTCOUNT to clear the IRQ source, consistent with the stale event clearing pattern in dwc3_event_buffers_setup(), and schedule error recovery to reinitialize the controller.

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

  • c0079630f268843a25ed75226169cba40e0d8880 to < 2c41e442ff6304532bf369aa618b23c8a474feb4affected
  • a44547015287a19001384fe94dbff84c92ce4ee1 to < 86b9c867fb061a147df05ff0d9bb69dd3d79f49aaffected
  • c4d80e41cb42008dceb35e5dbf52574d93beac0d to < 6cd82563bb270e03fe2f91324660ea14e3ce5d1aaffected
  • 52a7c9d930b95aa8b1620edaba4818040c32631f to < 96918ca25ff467c25675478fc79393df4ae9d74caffected
  • 63ccd26cd1f6600421795f6ca3e625076be06c9f to < ba927133b301894e7d24099afbb701887c8cd2f1affected
  • 63ccd26cd1f6600421795f6ca3e625076be06c9f to < f51cadb02b439850ab411df0a2cf4288a66d42e2affected
  • 63ccd26cd1f6600421795f6ca3e625076be06c9f to < 1ff77cbefe5a653ea12874c213ea4bd0d72c1067affected
  • 015c39f38e69a491d2abd5e98869a500a9459b3baffected
  • b43225948b231b3f331194010f84512bee4d9f59affected
  • 99d655119b870ee60e4dbf310aa9a1ed8d9ede3daffected
  • 5.15.181 to < 5.15.224affected
  • 6.1.136 to < 6.1.191affected
  • 6.6.89 to < 6.6.160affected
  • 6.12.26 to < 6.12.113affected
  • 5.4.293 to < 5.5affected
  • 5.10.237 to < 5.11affected
  • 6.14.5 to < 6.15affected

Linux Linux

Default version status: affected

  • 6.15affected
  • 0 to < 6.15unaffected
  • 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