{"id":"CVE-2026-98767","summary":"usb: dwc3: gadget: fix IRQ storm on invalid event buffer count","details":"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 -\u003e 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 \u003cDWC3_BASE + 0xc40c\u003e 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.","modified":"2026-10-20T02:30:56.427773211Z","published":"2026-10-18T15:48:02.089Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98767.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067"},{"type":"WEB","url":"https://git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98767.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98767"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"52a7c9d930b95aa8b1620edaba4818040c32631f"},{"fixed":"96918ca25ff467c25675478fc79393df4ae9d74c"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"63ccd26cd1f6600421795f6ca3e625076be06c9f"},{"fixed":"ba927133b301894e7d24099afbb701887c8cd2f1"},{"fixed":"f51cadb02b439850ab411df0a2cf4288a66d42e2"},{"fixed":"1ff77cbefe5a653ea12874c213ea4bd0d72c1067"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.12.26"},{"fixed":"6.12.113"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.4.293"},{"fixed":"5.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.10.237"},{"fixed":"5.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.181"},{"fixed":"5.16"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.1.136"},{"fixed":"6.2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.6.89"},{"fixed":"6.7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6.14.5"},{"fixed":"6.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"015c39f38e69a491d2abd5e98869a500a9459b3b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b43225948b231b3f331194010f84512bee4d9f59"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c0079630f268843a25ed75226169cba40e0d8880"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a44547015287a19001384fe94dbff84c92ce4ee1"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c4d80e41cb42008dceb35e5dbf52574d93beac0d"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"99d655119b870ee60e4dbf310aa9a1ed8d9ede3d"}]}],"versions":["v6.12.112","v6.12.111","v6.12.110","v6.12.109","v6.12.108","v6.12.107","v6.12.106","v6.12.105","v6.12.104","v6.12.103","v6.12.102","v6.12.101","v6.12.100","v6.12.99","v6.12.98","v6.12.97","v6.12.96","v6.12.95","v6.12.94","v6.12.93","v6.12.92","v6.12.91","v6.12.90","v6.12.89","v6.12.88","v6.12.87","v6.12.86","v6.12.85","v6.12.84","v6.12.83","v6.12.82","v6.12.81","v6.12.80","v6.12.79","v6.12.78","v6.12.77","v6.12.76","v6.12.75","v6.12.74","v6.12.73","v6.12.72","v6.12.71","v6.12.70","v6.12.69","v6.12.68","v6.12.67","v6.12.66","v6.12.65","v6.12.64","v6.12.63","v6.12.62","v6.12.61","v6.12.60","v6.12.59","v6.12.58","v6.12.57","v6.12.56","v6.12.55","v6.12.54","v6.12.53","v6.12.52","v6.12.51","v6.12.50","v6.12.49","v6.12.48","v6.12.47","v6.12.46","v6.12.45","v6.12.44","v6.12.43","v6.12.42","v6.12.41","v6.12.40","v6.12.39","v6.12.38","v6.12.37","v6.12.36","v6.12.35","v6.12.34","v6.12.33","v6.12.32","v6.12.31","v6.12.30","v6.12.29","v6.12.28","v6.12.27","v6.12.26","v5.4.302","v5.4.301","v5.4.300","v5.4.299","v5.4.298","v5.4.297","v5.4.296","v5.4.295","v5.4.294","v5.4.293","v5.10.272","v5.10.271","v5.10.270","v5.10.269","v5.10.268","v5.10.267","v5.10.266","v5.10.265","v5.10.264","v5.10.263","v5.10.262","v5.10.261","v5.10.260","v5.10.259","v5.10.258","v5.10.257","v5.10.256","v5.10.255","v5.10.254","v5.10.253","v5.10.252","v5.10.251","v5.10.250","v5.10.249","v5.10.248","v5.10.247","v5.10.246","v5.10.245","v5.10.244","v5.10.243","v5.10.242","v5.10.241","v5.10.240","v5.10.239","v5.10.238","v5.10.237","v5.15.223","v5.15.222","v5.15.221","v5.15.220","v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