usb: dwc3: gadget: fix IRQ storm on invalid event buffer count
Summary
| CVE | CVE-2026-98767 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-18 16:17:30 UTC |
| Updated | 2026-10-30 13:21:26 UTC |
| 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. |
Risk And Classification
EPSS: 0.001720000 probability, percentile 0.066130000 (date 2026-11-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected c0079630f268843a25ed75226169cba40e0d8880 2c41e442ff6304532bf369aa618b23c8a474feb4 git | Not specified |
| CNA | Linux | Linux | affected a44547015287a19001384fe94dbff84c92ce4ee1 86b9c867fb061a147df05ff0d9bb69dd3d79f49a git | Not specified |
| CNA | Linux | Linux | affected c4d80e41cb42008dceb35e5dbf52574d93beac0d 6cd82563bb270e03fe2f91324660ea14e3ce5d1a git | Not specified |
| CNA | Linux | Linux | affected 52a7c9d930b95aa8b1620edaba4818040c32631f 96918ca25ff467c25675478fc79393df4ae9d74c git | Not specified |
| CNA | Linux | Linux | affected 63ccd26cd1f6600421795f6ca3e625076be06c9f ba927133b301894e7d24099afbb701887c8cd2f1 git | Not specified |
| CNA | Linux | Linux | affected 63ccd26cd1f6600421795f6ca3e625076be06c9f f51cadb02b439850ab411df0a2cf4288a66d42e2 git | Not specified |
| CNA | Linux | Linux | affected 63ccd26cd1f6600421795f6ca3e625076be06c9f 1ff77cbefe5a653ea12874c213ea4bd0d72c1067 git | Not specified |
| CNA | Linux | Linux | affected 015c39f38e69a491d2abd5e98869a500a9459b3b git | Not specified |
| CNA | Linux | Linux | affected b43225948b231b3f331194010f84512bee4d9f59 git | Not specified |
| CNA | Linux | Linux | affected 99d655119b870ee60e4dbf310aa9a1ed8d9ede3d git | Not specified |
| CNA | Linux | Linux | affected 5.15.181 5.15.224 semver | Not specified |
| CNA | Linux | Linux | affected 6.1.136 6.1.191 semver | Not specified |
| CNA | Linux | Linux | affected 6.6.89 6.6.160 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.26 6.12.113 semver | Not specified |
| CNA | Linux | Linux | affected 5.4.293 5.5 semver | Not specified |
| CNA | Linux | Linux | affected 5.10.237 5.11 semver | Not specified |
| CNA | Linux | Linux | affected 6.14.5 6.15 semver | Not specified |
| CNA | Linux | Linux | affected 6.15 | Not specified |
| CNA | Linux | Linux | unaffected 6.15 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.224 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.191 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.160 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.113 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.56 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2.10 7.2.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.3 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/6cd82563bb270e03fe2f91324660ea14e3ce5d1a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/2c41e442ff6304532bf369aa618b23c8a474feb4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/86b9c867fb061a147df05ff0d9bb69dd3d79f49a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.