{"id":"CVE-2026-98767","state":"PUBLISHED","title":"usb: dwc3: gadget: fix IRQ storm on invalid event buffer count","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: gadget: fix IRQ storm on invalid event buffer count\n\nWhen dwc3_check_event_buf() reads a GEVNTCOUNT value exceeding the\nevent buffer length, commit 63ccd26cd1f6 (\"usb: dwc3: gadget: check\nthat event count does not exceed event buffer length\") returns IRQ_NONE\nwithout writing back GEVNTCOUNT. Since the DWC3 interrupt is\nlevel-triggered, the uncleared IRQ source keeps the line asserted,\ncausing a tight IRQ storm that accumulates 99,900 unhandled interrupts\nand triggers spurious.c:184 BUG -> kernel panic.\n\nThe resulting call stack:\n  __report_bad_irq+0xac/0xc8\n  note_interrupt+0x340/0x468\n  handle_irq_event+0xac/0xc0\n  handle_fasteoi_irq+0x120/0x228\n  gic_handle_irq+0x68/0x108\n  ...\n  kernel BUG at kernel/irq/spurious.c:184\n\nTo reproduce, write a bogus value exceeding the event buffer length\ndirectly to the GEVNTCOUNT register:\n\n  devmem <DWC3_BASE + 0xc40c> 4 0x1004\n\nWrite the bogus count back to GEVNTCOUNT to clear the IRQ source,\nconsistent with the stale event clearing pattern in\ndwc3_event_buffers_setup(), and schedule error recovery to\nreinitialize the controller.","publishedAt":"2026-10-18T15:48:02.089Z","updatedAt":"2026-10-30T12:39:36.527Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c0079630f268843a25ed75226169cba40e0d8880","status":"affected","lessThan":"2c41e442ff6304532bf369aa618b23c8a474feb4","versionType":"git"},{"version":"a44547015287a19001384fe94dbff84c92ce4ee1","status":"affected","lessThan":"86b9c867fb061a147df05ff0d9bb69dd3d79f49a","versionType":"git"},{"version":"c4d80e41cb42008dceb35e5dbf52574d93beac0d","status":"affected","lessThan":"6cd82563bb270e03fe2f91324660ea14e3ce5d1a","versionType":"git"},{"version":"52a7c9d930b95aa8b1620edaba4818040c32631f","status":"affected","lessThan":"96918ca25ff467c25675478fc79393df4ae9d74c","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"ba927133b301894e7d24099afbb701887c8cd2f1","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"f51cadb02b439850ab411df0a2cf4288a66d42e2","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"1ff77cbefe5a653ea12874c213ea4bd0d72c1067","versionType":"git"},{"version":"015c39f38e69a491d2abd5e98869a500a9459b3b","status":"affected","versionType":"git"},{"version":"b43225948b231b3f331194010f84512bee4d9f59","status":"affected","versionType":"git"},{"version":"99d655119b870ee60e4dbf310aa9a1ed8d9ede3d","status":"affected","versionType":"git"},{"version":"5.15.181","status":"affected","lessThan":"5.15.224","versionType":"semver"},{"version":"6.1.136","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"6.6.89","status":"affected","lessThan":"6.6.160","versionType":"semver"},{"version":"6.12.26","status":"affected","lessThan":"6.12.113","versionType":"semver"},{"version":"5.4.293","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.237","status":"affected","lessThan":"5.11","versionType":"semver"},{"version":"6.14.5","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc3/core.h","drivers/usb/dwc3/ep0.c","drivers/usb/dwc3/gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc3/core.h","drivers/usb/dwc3/ep0.c","drivers/usb/dwc3/gadget.c"]}],"references":["https://git.kernel.org/stable/c/2c41e442ff6304532bf369aa618b23c8a474feb4","https://git.kernel.org/stable/c/86b9c867fb061a147df05ff0d9bb69dd3d79f49a","https://git.kernel.org/stable/c/6cd82563bb270e03fe2f91324660ea14e3ce5d1a","https://git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c","https://git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1","https://git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2","https://git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98767.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98767","state":"PUBLISHED","datePublished":"2026-10-18T15:48:02.089Z","dateUpdated":"2026-10-30T12:39:36.527Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.369Z"},"containers":{"cna":{"title":"usb: dwc3: gadget: fix IRQ storm on invalid event buffer count","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: gadget: fix IRQ storm on invalid event buffer count\n\nWhen dwc3_check_event_buf() reads a GEVNTCOUNT value exceeding the\nevent buffer length, commit 63ccd26cd1f6 (\"usb: dwc3: gadget: check\nthat event count does not exceed event buffer length\") returns IRQ_NONE\nwithout writing back GEVNTCOUNT. Since the DWC3 interrupt is\nlevel-triggered, the uncleared IRQ source keeps the line asserted,\ncausing a tight IRQ storm that accumulates 99,900 unhandled interrupts\nand triggers spurious.c:184 BUG -> kernel panic.\n\nThe resulting call stack:\n  __report_bad_irq+0xac/0xc8\n  note_interrupt+0x340/0x468\n  handle_irq_event+0xac/0xc0\n  handle_fasteoi_irq+0x120/0x228\n  gic_handle_irq+0x68/0x108\n  ...\n  kernel BUG at kernel/irq/spurious.c:184\n\nTo reproduce, write a bogus value exceeding the event buffer length\ndirectly to the GEVNTCOUNT register:\n\n  devmem <DWC3_BASE + 0xc40c> 4 0x1004\n\nWrite the bogus count back to GEVNTCOUNT to clear the IRQ source,\nconsistent with the stale event clearing pattern in\ndwc3_event_buffers_setup(), and schedule error recovery to\nreinitialize the controller."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c0079630f268843a25ed75226169cba40e0d8880","status":"affected","lessThan":"2c41e442ff6304532bf369aa618b23c8a474feb4","versionType":"git"},{"version":"a44547015287a19001384fe94dbff84c92ce4ee1","status":"affected","lessThan":"86b9c867fb061a147df05ff0d9bb69dd3d79f49a","versionType":"git"},{"version":"c4d80e41cb42008dceb35e5dbf52574d93beac0d","status":"affected","lessThan":"6cd82563bb270e03fe2f91324660ea14e3ce5d1a","versionType":"git"},{"version":"52a7c9d930b95aa8b1620edaba4818040c32631f","status":"affected","lessThan":"96918ca25ff467c25675478fc79393df4ae9d74c","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"ba927133b301894e7d24099afbb701887c8cd2f1","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"f51cadb02b439850ab411df0a2cf4288a66d42e2","versionType":"git"},{"version":"63ccd26cd1f6600421795f6ca3e625076be06c9f","status":"affected","lessThan":"1ff77cbefe5a653ea12874c213ea4bd0d72c1067","versionType":"git"},{"version":"015c39f38e69a491d2abd5e98869a500a9459b3b","status":"affected","versionType":"git"},{"version":"b43225948b231b3f331194010f84512bee4d9f59","status":"affected","versionType":"git"},{"version":"99d655119b870ee60e4dbf310aa9a1ed8d9ede3d","status":"affected","versionType":"git"},{"version":"5.15.181","status":"affected","lessThan":"5.15.224","versionType":"semver"},{"version":"6.1.136","status":"affected","lessThan":"6.1.191","versionType":"semver"},{"version":"6.6.89","status":"affected","lessThan":"6.6.160","versionType":"semver"},{"version":"6.12.26","status":"affected","lessThan":"6.12.113","versionType":"semver"},{"version":"5.4.293","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.237","status":"affected","lessThan":"5.11","versionType":"semver"},{"version":"6.14.5","status":"affected","lessThan":"6.15","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc3/core.h","drivers/usb/dwc3/ep0.c","drivers/usb/dwc3/gadget.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/dwc3/core.h","drivers/usb/dwc3/ep0.c","drivers/usb/dwc3/gadget.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2c41e442ff6304532bf369aa618b23c8a474feb4"},{"url":"https://git.kernel.org/stable/c/86b9c867fb061a147df05ff0d9bb69dd3d79f49a"},{"url":"https://git.kernel.org/stable/c/6cd82563bb270e03fe2f91324660ea14e3ce5d1a"},{"url":"https://git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c"},{"url":"https://git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1"},{"url":"https://git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2"},{"url":"https://git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:36.527Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.181","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.136","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.89","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.26","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versi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