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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98765: USB: gadget: dummy-hcd: Fix wait for outstanding request completions

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 3.17, 3.3, 3070806a7bc7bb36ed04a21022c09dafcc5619f4; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 3.17, 3.3, 3070806a7bc7bb36ed04a21022c09dafcc5619f4; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 7b416b9dac6ede26d4ca0c1a88b448b543623ff3, 8590bc1da625dd4a589eac0fc3aa3cf4f400424d, a867d5b932ac4911d3f8a1e63505061b0c81f889, e84b4a008365b7edbd842a063ae28d040a98db25, e39b17143a5b5aac81f066d455e5d3a9877eb3ae, 4f8ae1fcb0dfbb72a7678f81bf01fb7fc85c6715, 4.14affected
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 32721319e89a2be610b0518b88f0d188ce878063affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 48ef54100ceffbd1a055f193873574c45f408eb5affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before d77cc7c0d739fb17413714c5c4914bd396502e20affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 6849e51b89de5b6fc7447dc8e612b58df19c7deaaffected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 5298c96bf0068f3160969f7ddad81976d01a9b66affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before 3070806a7bc7bb36ed04a21022c09dafcc5619f4affected · git
    • 7dbd8f4cabd96db5a50513de9d83a8105a5ffc81 and later · before b263ff9b0fc5c1f371d65c4eb196b31263d039ffaffected · git
    • 3.2.97 and later · before 3.3affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98763Oct 18, 2026 · usb: core: clear both ep_in and ep_out for non-ep0 control endpoints
    0Monitor
  • ← EarlierCVE-2026-98764Oct 18, 2026 · usb: gadget: f_fs: Fix NULL pointer dereference in FUNCTIONFS_ENDPOINT_DESC
    0Monitor
  • Later →CVE-2026-98766Oct 18, 2026 · usb: gadget: aspeed-vhub: cancel wake work on device removal
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux3.17Vendor (CNA)
Linux Linux3.3Vendor (CNA)
Linux Linux3070806a7bc7bb36ed04a21022c09dafcc5619f4Vendor (CNA)
Linux Linux32721319e89a2be610b0518b88f0d188ce878063Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.14Vendor (CNA)
Linux Linux4.2Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux48ef54100ceffbd1a055f193873574c45f408eb5Vendor (CNA)
Linux Linux5298c96bf0068f3160969f7ddad81976d01a9b66Vendor (CNA)
Linux Linux6849e51b89de5b6fc7447dc8e612b58df19c7deaVendor (CNA)
Linux Linux7ce4dca0d53b1c3cb2b7e7bb2e42bf5db860caf2Vendor (CNA)
Linux Linuxb263ff9b0fc5c1f371d65c4eb196b31263d039ffVendor (CNA)
Linux Linuxd77cc7c0d739fb17413714c5c4914bd396502e20Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records