CVE-2026-64347

Kernel crash via empty configuration-list dereference

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds read in the Linux Kernel USB gadget composite driver allows local users to crash the kernel through an OTG control transfer. composite_setup() uses list_first_entry() on an empty cdev->configs list, derives a bogus configuration pointer, and copies descriptor data from an invalid address into the response buffer. Reachability requires an OTG gadget whose configuration list is empty during an unbind race or before a driver adds its first configuration; the demonstrated consequence is a KASAN fault and service crash.

CVSS severity5.5
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in the Linux Kernel USB gadget composite driver allows local users to crash the kernel through an OTG control transfer. composite_setup() uses list_first_entry() on an empty cdev->configs list, derives a bogus configuration pointer, and copies descriptor data from an invalid address into the response buffer. Reachability requires an OTG gadget whose configuration list is empty during an unbind race or before a driver adds its first configuration; the demonstrated consequence is a KASAN fault and service crash.

The record

CVE
CVE-2026-64347
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.3
  2. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <01feaf024f29618d5ffa7ab0fd858e0579dcbf7b
  3. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <2454264b2ab4cf0055c0bfd39e79f830452bd0db
  4. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <56add2b9b2e89ec61c0761165d758f73004fdfdf
  5. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483
  6. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <91b3ecd34b60f950c50c560974945b6596a6f207
  7. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <d3e72cfef2e38bd588055739a8100d14f9773b17
  8. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <f8f680609c2b3ab795ffcd6f21585b6dfc46d395
  9. Affected versionversion=53e6242db8d60da0587d36951cc9434d1a1c21dd <fcb21bf747640c9d6bd1eda9da85420f076d59c1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.3; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <01feaf024f29618d5ffa7ab0fd858e0579dcbf7b; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <2454264b2ab4cf0055c0bfd39e79f830452bd0db; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <56add2b9b2e89ec61c0761165d758f73004fdfdf; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <91b3ecd34b60f950c50c560974945b6596a6f207; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <d3e72cfef2e38bd588055739a8100d14f9773b17; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <f8f680609c2b3ab795ffcd6f21585b6dfc46d395; version=53e6242db8d60da0587d36951cc9434d1a1c21dd <fcb21bf747640c9d6bd1eda9da85420f076d59c1

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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