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CVE-2026-98767

usb: dwc3: gadget: fix IRQ storm on invalid event buffer count

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:25:33 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

17 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

c0079630f268843a25ed75226169cba40e0d8880 → before 2c41e442ff6304532bf369aa618b23c8a474feb4

git versions

a44547015287a19001384fe94dbff84c92ce4ee1 → before 86b9c867fb061a147df05ff0d9bb69dd3d79f49a

git versions

c4d80e41cb42008dceb35e5dbf52574d93beac0d → before 6cd82563bb270e03fe2f91324660ea14e3ce5d1a

git versions

52a7c9d930b95aa8b1620edaba4818040c32631f → before 96918ca25ff467c25675478fc79393df4ae9d74c

git versions

63ccd26cd1f6600421795f6ca3e625076be06c9f → before ba927133b301894e7d24099afbb701887c8cd2f1

git versions

63ccd26cd1f6600421795f6ca3e625076be06c9f → before f51cadb02b439850ab411df0a2cf4288a66d42e2

git versions

63ccd26cd1f6600421795f6ca3e625076be06c9f → before 1ff77cbefe5a653ea12874c213ea4bd0d72c1067

git versions

015c39f38e69a491d2abd5e98869a500a9459b3b

git versions

b43225948b231b3f331194010f84512bee4d9f59

git versions

99d655119b870ee60e4dbf310aa9a1ed8d9ede3d

git versions

5.15.181 → before 5.15.224

semver versions

6.1.136 → before 6.1.191

semver versions

6.6.89 → before 6.6.160

semver versions

6.12.26 → before 6.12.113

semver versions

5.4.293 → before 5.5

semver versions

5.10.237 → before 5.11

semver versions

6.14.5 → before 6.15

semver versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

9 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

6.15

unaffected

0 → before 6.15

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.113 → through 6.12.*

semver versions

6.18.56 → through 6.18.*

semver versions

7.2.10 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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.

References

7 sources
git.kernel.org/stable/c/2c41e442ff6304532bf369aa618b23c8a474feb4
Source referenceLinux
git.kernel.org/stable/c/86b9c867fb061a147df05ff0d9bb69dd3d79f49a
Source referenceLinux
git.kernel.org/stable/c/6cd82563bb270e03fe2f91324660ea14e3ce5d1a
Source referenceLinux
git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c
Source referenceLinux
git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1
Source referenceLinux
git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2
Source referenceLinux
View 1 more references
git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-98767

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.15.181

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.1.136

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.6.89

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.12.26

Before: 6.12.113

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.15

Before: 6.18.56

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.15

Before: 7.2.10

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.15

Before: 7.3

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.4.293

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10.237

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.14.5

Applicability preview
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    "nodes": [
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            "vulnerable": true,
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            "vulnerable": true,
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            "versionStartIncluding": "6.14.5"
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]
Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.