CVE-2026-64463

Kernel memory corruption via incomplete probe cleanup

Published Jul 25, 2026 · Updated Jul 25, 2026

Incomplete cleanup in the RT1711H USB Type-C driver in affected Linux Kernel releases allows local users to corrupt kernel memory. After tcpci_register_port() succeeds, rt1711h_probe() returns on interrupt-request or alert-enable failure without unregistering the TCPCI port, leaving queued work and a timer to reference freed memory. A basic local user must induce a later probe failure and can then cause information disclosure, arbitrary kernel-memory writes, or an oops, panic, or persistent hang.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incomplete cleanup in the RT1711H USB Type-C driver in affected Linux Kernel releases allows local users to corrupt kernel memory. After tcpci_register_port() succeeds, rt1711h_probe() returns on interrupt-request or alert-enable failure without unregistering the TCPCI port, leaving queued work and a timer to reference freed memory. A basic local user must induce a later probe failure and can then cause information disclosure, arbitrary kernel-memory writes, or an oops, panic, or persistent hang.

The record

CVE
CVE-2026-64463
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-459, T1068
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=302c570bf36e997d55ad0d60628a2feec76954a4 <569f18a83eed0b0be4615f0c7bed40fb5c50e2e6
  2. Affected versionversion=302c570bf36e997d55ad0d60628a2feec76954a4 <94b1abf1af94aa5a355e9f03675e07bccfc41c4b
  3. Affected versionversion=302c570bf36e997d55ad0d60628a2feec76954a4 <ce2e36e8759dfbfe546723810c306f42f484866d
  4. Affected versionversion=302c570bf36e997d55ad0d60628a2feec76954a4 <e5406c8fb71cd2f89a46300a746f6e7972e621e8
  5. Affected versionversion=302c570bf36e997d55ad0d60628a2feec76954a4 <e8da46d99d3710106e7c44db14566bf9b57386b5
  6. Affected versionversion=4.19.131 <4.20
  7. Affected versionversion=4309ab96ab744703871e35d829177dd9347bf643
  8. Affected versionversion=5.4.50 <5.5
  9. Affected versionversion=5.7.7 <5.8
  10. Affected versionversion=5.8
  11. Affected versionversion=745dcedb896a740825160228f98dbb5725a49f85
  12. Affected versionversion=895ec8c86e13f85b119c71d5f95491b48867955e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=302c570bf36e997d55ad0d60628a2feec76954a4 <569f18a83eed0b0be4615f0c7bed40fb5c50e2e6; version=302c570bf36e997d55ad0d60628a2feec76954a4 <94b1abf1af94aa5a355e9f03675e07bccfc41c4b; version=302c570bf36e997d55ad0d60628a2feec76954a4 <ce2e36e8759dfbfe546723810c306f42f484866d; version=302c570bf36e997d55ad0d60628a2feec76954a4 <e5406c8fb71cd2f89a46300a746f6e7972e621e8; version=302c570bf36e997d55ad0d60628a2feec76954a4 <e8da46d99d3710106e7c44db14566bf9b57386b5; version=4.19.131 <4.20; version=4309ab96ab744703871e35d829177dd9347bf643; version=5.4.50 <5.5; version=5.7.7 <5.8; version=5.8; version=745dcedb896a740825160228f98dbb5725a49f85; version=895ec8c86e13f85b119c71d5f95491b48867955e

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
T1068Exploitation for Privilege Escalation

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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