usb: dwc3: gadget: fix IRQ storm on invalid event buffer count
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 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.
CVE-2026-98767
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98767
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "c4d80e41cb42008dceb35e5dbf52574d93beac0d",
"lessThan": "6cd82563bb270e03fe2f91324660ea14e3ce5d1a",
"versionType": "git"
},
{
"status": "affected",
"version": "52a7c9d930b95aa8b1620edaba4818040c32631f",
"lessThan": "96918ca25ff467c25675478fc79393df4ae9d74c",
"versionType": "git"
},
{
"status": "affected",
"version": "63ccd26cd1f6600421795f6ca3e625076be06c9f",
"lessThan": "ba927133b301894e7d24099afbb701887c8cd2f1",
"versionType": "git"
},
{
"status": "affected",
"version": "63ccd26cd1f6600421795f6ca3e625076be06c9f",
"lessThan": "f51cadb02b439850ab411df0a2cf4288a66d42e2",
"versionType": "git"
},
{
"status": "affected",
"version": "63ccd26cd1f6600421795f6ca3e625076be06c9f",
"lessThan": "1ff77cbefe5a653ea12874c213ea4bd0d72c1067",
"versionType": "git"
},
{
"status": "affected",
"version": "015c39f38e69a491d2abd5e98869a500a9459b3b",
"versionType": "git"
},
{
"status": "affected",
"version": "b43225948b231b3f331194010f84512bee4d9f59",
"versionType": "git"
},
{
"status": "affected",
"version": "c0079630f268843a25ed75226169cba40e0d8880",
"versionType": "git"
},
{
"status": "affected",
"version": "a44547015287a19001384fe94dbff84c92ce4ee1",
"versionType": "git"
},
{
"status": "affected",
"version": "99d655119b870ee60e4dbf310aa9a1ed8d9ede3d",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.89",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.26",
"lessThan": "6.12.113",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.4.293",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.237",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.181",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.136",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.14.5",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"drivers/usb/dwc3/core.h",
"drivers/usb/dwc3/ep0.c",
"drivers/usb/dwc3/gadget.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/dwc3/core.h",
"drivers/usb/dwc3/ep0.c",
"drivers/usb/dwc3/gadget.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98767
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48962 · Revision 1
- Added to Heist Feed
- Publisher date