CVE-2026-98765USB: gadget: dummy-hcd: Fix wait for outstanding request completions
- —Not scoredno CVSS score yet
- 0.18%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: gadget: dummy-hcd: Fix wait for outstanding request completions The dummy-hcd driver emulates synchronize_irq() by waiting until its private callback_usage counter drops to 0 (with the private lock not held). This counter is incremented whenever a gadget driver callback occurs (which requires the private lock to be dropped), but not when a request completion handler is called. This is an oversight. Request completion is triggered by timer interrupts (emulating device IRQs in a real UDC), and the interrupt handlers are supposed to have completed when the synchronize_irq() emulation routine returns -- they aren't supposed to be in the middle of a completion callback. If this happens it can lead to a gadget driver's unbind routine running before all outstanding request completions have finished, maybe even allowing the gadget driver's module to be unloaded while a completion handler is still running. Fix the oversight by incrementing the callback_usage value across request completion callbacks.
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)
- 0.18% · 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 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 32721319e89a2be610b0518b88f0d188ce878063
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 48ef54100ceffbd1a055f193873574c45f408eb5
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < d77cc7c0d739fb17413714c5c4914bd396502e20
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 6849e51b89de5b6fc7447dc8e612b58df19c7dea
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 5298c96bf0068f3160969f7ddad81976d01a9b66
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < 3070806a7bc7bb36ed04a21022c09dafcc5619f4
- affected 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 – < b263ff9b0fc5c1f371d65c4eb196b31263d039ff
- affected 7b416b9dac6ede26d4ca0c1a88b448b543623ff3
- affected 8590bc1da625dd4a589eac0fc3aa3cf4f400424d
- affected a867d5b932ac4911d3f8a1e63505061b0c81f889
- affected e84b4a008365b7edbd842a063ae28d040a98db25
- affected e39b17143a5b5aac81f066d455e5d3a9877eb3ae
- affected 4f8ae1fcb0dfbb72a7678f81bf01fb7fc85c6715
- affected 3.2.97 – < 3.3
- affected 3.16.52 – < 3.17
- affected 4.1.46 – < 4.2
- affected 4.4.92 – < 4.5
- affected 4.9.55 – < 4.10
- affected 4.13.6 – < 4.14
- affected 4.14
- unaffected < 4.14
- unaffected 5.10.273 – ≤ 5.10.*
- 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
References8
- https://git.kernel.org/stable/c/32721319e89a2be610b0518b88f0d188ce878063 (opens in a new tab)
- https://git.kernel.org/stable/c/48ef54100ceffbd1a055f193873574c45f408eb5 (opens in a new tab)
- https://git.kernel.org/stable/c/d77cc7c0d739fb17413714c5c4914bd396502e20 (opens in a new tab)
- https://git.kernel.org/stable/c/6849e51b89de5b6fc7447dc8e612b58df19c7dea (opens in a new tab)
- https://git.kernel.org/stable/c/7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2 (opens in a new tab)
- https://git.kernel.org/stable/c/5298c96bf0068f3160969f7ddad81976d01a9b66 (opens in a new tab)
- https://git.kernel.org/stable/c/3070806a7bc7bb36ed04a21022c09dafcc5619f4 (opens in a new tab)
- https://git.kernel.org/stable/c/b263ff9b0fc5c1f371d65c4eb196b31263d039ff (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-2026-103850 (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)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98765)Record last updated .