CVE-2026-98767usb: dwc3: gadget: fix IRQ storm on invalid event buffer count
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected c0079630f268843a25ed75226169cba40e0d8880 – < 2c41e442ff6304532bf369aa618b23c8a474feb4
- affected a44547015287a19001384fe94dbff84c92ce4ee1 – < 86b9c867fb061a147df05ff0d9bb69dd3d79f49a
- affected c4d80e41cb42008dceb35e5dbf52574d93beac0d – < 6cd82563bb270e03fe2f91324660ea14e3ce5d1a
- affected 52a7c9d930b95aa8b1620edaba4818040c32631f – < 96918ca25ff467c25675478fc79393df4ae9d74c
- affected 63ccd26cd1f6600421795f6ca3e625076be06c9f – < ba927133b301894e7d24099afbb701887c8cd2f1
- affected 63ccd26cd1f6600421795f6ca3e625076be06c9f – < f51cadb02b439850ab411df0a2cf4288a66d42e2
- affected 63ccd26cd1f6600421795f6ca3e625076be06c9f – < 1ff77cbefe5a653ea12874c213ea4bd0d72c1067
- affected 015c39f38e69a491d2abd5e98869a500a9459b3b
- affected b43225948b231b3f331194010f84512bee4d9f59
- affected 99d655119b870ee60e4dbf310aa9a1ed8d9ede3d
- affected 5.15.181 – < 5.15.224
- affected 6.1.136 – < 6.1.191
- affected 6.6.89 – < 6.6.160
- affected 6.12.26 – < 6.12.113
- affected 5.4.293 – < 5.5
- affected 5.10.237 – < 5.11
- affected 6.14.5 – < 6.15
- affected 6.15
- unaffected < 6.15
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.56 – ≤ 6.18.*
- unaffected 7.2.10 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References7
- https://git.kernel.org/stable/c/2c41e442ff6304532bf369aa618b23c8a474feb4 (opens in a new tab)
- https://git.kernel.org/stable/c/86b9c867fb061a147df05ff0d9bb69dd3d79f49a (opens in a new tab)
- https://git.kernel.org/stable/c/6cd82563bb270e03fe2f91324660ea14e3ce5d1a (opens in a new tab)
- https://git.kernel.org/stable/c/96918ca25ff467c25675478fc79393df4ae9d74c (opens in a new tab)
- https://git.kernel.org/stable/c/ba927133b301894e7d24099afbb701887c8cd2f1 (opens in a new tab)
- https://git.kernel.org/stable/c/f51cadb02b439850ab411df0a2cf4288a66d42e2 (opens in a new tab)
- https://git.kernel.org/stable/c/1ff77cbefe5a653ea12874c213ea4bd0d72c1067 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-103852 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-98767)Record last updated .