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CVE-2026-98767— usb: dwc3: gadget: fix IRQ storm on invalid event buffer count

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： usb: dwc3: gadget：修复因无效事件缓冲区计数引发的中断风暴（IRQ storm） 当 读取到 GEVNTCOUNT 值超过事件缓冲区长度时，提交 63ccd26cd1f6（"usb: dwc3: gadget: 检查事件计数是否超出事件缓冲区长度"）会返回 IRQ_NONE，但未将 GEVNTCOUNT 写回。由于 DWC3 中断为电平触发（level-triggered），未清除的中断源会使中断线持续保持断言状态，从而引发紧密的中断风暴，累积多达 99

AI Predicted 8.1 Difficulty: Moderate EPSS 0.17% · P6

Affected Version Matrix 24

VendorProduct Version RangeStatus
Linux Linux c4d80e41cb42008dceb35e5dbf52574d93beac0d< 6cd82563bb270e03fe2f91324660ea14e3ce5d1a affected
52a7c9d930b95aa8b1620edaba4818040c32631f< 96918ca25ff467c25675478fc79393df4ae9d74c affected
63ccd26cd1f6600421795f6ca3e625076be06c9f< ba927133b301894e7d24099afbb701887c8cd2f1 affected
63ccd26cd1f6600421795f6ca3e625076be06c9f< f51cadb02b439850ab411df0a2cf4288a66d42e2 affected
63ccd26cd1f6600421795f6ca3e625076be06c9f< 1ff77cbefe5a653ea12874c213ea4bd0d72c1067 affected
015c39f38e69a491d2abd5e98869a500a9459b3b affected
b43225948b231b3f331194010f84512bee4d9f59 affected
c0079630f268843a25ed75226169cba40e0d8880 affected
… +16 more rows
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I. Basic Information for CVE-2026-98767

Vulnerability Information
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Vulnerability Title
usb: dwc3: gadget: fix IRQ storm on invalid event buffer count
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux c4d80e41cb42008dceb35e5dbf52574d93beac0d ~ 6cd82563bb270e03fe2f91324660ea14e3ce5d1a -
Linux Linux 6.15 -

II. Public POCs for CVE-2026-98767

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III. Intelligence Information for CVE-2026-98767

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Patches & Fixes for CVE-2026-98767 (3)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98548 9.8 CRITICAL sctp: discard the rest of the packet on a stale-cookie error
CVE-2026-98490 9.8 CRITICAL net: openvswitch: conntrack: fix helper UAF due to extensions realloc
CVE-2026-98464 9.3 CRITICAL RISC-V: KVM: Synchronize hrtimer callback during teardown
CVE-2026-98549 9.1 CRITICAL tcp: prevent collapsing skbs across boundary in rtx queue
CVE-2026-98451 8.8 HIGH smb: client: use finish_no_open() for non-regular inodes
CVE-2026-98466 8.2 HIGH KVM: arm64: Transfer the hyp stack pages out of the host stage-2
CVE-2026-98532 8.1 HIGH ipv6: do not let ipv6_find_hdr() return an offset past the packet end
CVE-2026-98499 8.1 HIGH HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()
CVE-2026-98454 8.1 HIGH smb: client: fix create context out-of-bounds reads
CVE-2026-98524 7.8 HIGH rds: ib: Clear the sg list when mapping an MR fails
CVE-2026-98520 7.8 HIGH drm/amdkfd: fix use-after-free and multi-container gap in kfd_dev_mapping
CVE-2026-98491 7.8 HIGH net: openvswitch: conntrack: avoid modifying shared unconfirmed ct entry
CVE-2026-98517 7.8 HIGH drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM
CVE-2026-98443 7.8 HIGH xfs: fix cursor and pointer handling when recovering iunlink buckets
CVE-2026-98436 7.8 HIGH accel/amdxdna: Disable device buffer exporting
CVE-2026-98510 7.8 HIGH drm/xe/vm: nuke PTs only after unlinking contested VMAs
CVE-2026-98515 7.8 HIGH drm/nouveau: fix double-free in nvif_vmm_dtor
CVE-2026-98487 7.8 HIGH net: bridge: mdb: restart port group walk after deletion
CVE-2026-98507 7.8 HIGH mm/rmap: fix missing barrier between anon_vma init and vma->anon_vma publish
CVE-2026-98442 7.8 HIGH net/sched: act_ct: fix helper UAF due to extensions realloc

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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Same vendor: Linux