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NVD / CVE Program· CNA Linux

CVE-2026-64347: usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.09% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 01feaf024f29618d5ffa7ab0fd858e0579dcbf7b, 2454264b2ab4cf0055c0bfd39e79f830452bd0db, 56add2b9b2e89ec61c0761165d758f73004fdfdf.

Low priority for now. Upgrade to Linux Linux 01feaf024f29618d5ffa7ab0fd858e0579dcbf7b, 2454264b2ab4cf0055c0bfd39e79f830452bd0db, 56add2b9b2e89ec61c0761165d758f73004fdfdf 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: composite: fix dead empty check in the USB_DT_OTG handler The OTG branch of composite_setup() falls back to the first configuration when none is selected: if (cdev->config) config = cdev->config; else config = list_first_entry(&cdev->configs, struct usb_configuration, list); if (!config) goto done; ... memcpy(req->buf, config->descriptors[0], value); list_first_entry() never returns NULL. On an empty list it returns container_of() of the list head. So the "if (!config)" check is dead. When cdev->configs is empty, config points at the head inside struct usb_composite_dev. config->descriptors[0] reads whatever sits at that offset. The memcpy copies up to w_length bytes of it into the response buffer. cdev->configs can be empty in two cases. One is a teardown race on gadget unbind with a control transfer in flight. The other is a driver that sets is_otg before it adds a config. A reproducer that holds cdev->configs empty triggers a KASAN fault in this branch. Use list_first_entry_or_null() so the existing check does its job.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 25, 2026
Updated
Sep 3, 2026
EPSS
0.0% · 0th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.0%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.3 and later · before 5.10.261
  • linux linux kernel5.11 and later · before 5.15.212
  • linux linux kernel5.16 and later · before 6.1.178
  • linux linux kernel6.2 and later · before 6.6.145
  • linux linux kernel6.7 and later · before 6.12.96
  • linux linux kernel6.13 and later · before 6.18.39
  • linux linux kernel6.19 and later · before 7.1.4
  • linux linux kernel7.2

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

    • 4.3affected
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before 2454264b2ab4cf0055c0bfd39e79f830452bd0dbaffected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before d3e72cfef2e38bd588055739a8100d14f9773b17affected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before 8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483affected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before 56add2b9b2e89ec61c0761165d758f73004fdfdfaffected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before 91b3ecd34b60f950c50c560974945b6596a6f207affected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before 01feaf024f29618d5ffa7ab0fd858e0579dcbf7baffected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before fcb21bf747640c9d6bd1eda9da85420f076d59c1affected · git
    • 53e6242db8d60da0587d36951cc9434d1a1c21dd and later · before f8f680609c2b3ab795ffcd6f21585b6dfc46d395affected · git
    • before 4.3not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:12linux-6.12before 6.12.100-1~deb12u16.12.100-1~deb12u1
Debian:13linuxbefore 6.12.96-16.12.96-1
Debian:14linuxbefore 7.1.4-17.1.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64345Jul 25, 2026 · usb: gadget: f_printer: take kref only for successful open
    22Monitor
  • ← EarlierCVE-2026-64346Jul 25, 2026 · usb: gadget: udc: Fix use-after-free in gadget_match_driver
    31Monitor
  • Later →CVE-2026-64348Jul 25, 2026 · usb: free iso schedules on failed submit
    31Monitor

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 Linux01feaf024f29618d5ffa7ab0fd858e0579dcbf7bVendor (CNA)
Linux Linux2454264b2ab4cf0055c0bfd39e79f830452bd0dbVendor (CNA)
Linux Linux56add2b9b2e89ec61c0761165d758f73004fdfdfVendor (CNA)
Linux Linux8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483Vendor (CNA)
Linux Linux91b3ecd34b60f950c50c560974945b6596a6f207Vendor (CNA)
Linux Linuxd3e72cfef2e38bd588055739a8100d14f9773b17Vendor (CNA)
Linux Linuxf8f680609c2b3ab795ffcd6f21585b6dfc46d395Vendor (CNA)
Linux Linuxfcb21bf747640c9d6bd1eda9da85420f076d59c1Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.100-1~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.

No dated events beyond publication.

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.

—

Bug bounty scope

No known public program.

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

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-667 · Improper Locking

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

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

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records