CVE-2026-74441

Kernel crash via UCSI teardown race

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel USB Type-C UCSI driver allows local users to crash the system during port unregistration. Pending partner work can race with destruction of the connector workqueue, allowing callbacks to queue against freed state or release resources twice. Exploitation requires low-privileged local access and a UCSI port teardown; the demonstrated consequence is a kernel crash, while code execution remains unproven.

CVSS severity7.0
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel USB Type-C UCSI driver allows local users to crash the system during port unregistration. Pending partner work can race with destruction of the connector workqueue, allowing callbacks to queue against freed state or release resources twice. Exploitation requires low-privileged local access and a UCSI port teardown; the demonstrated consequence is a kernel crash, while code execution remains unproven.

The record

CVE
CVE-2026-74441
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-825, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.16
  2. Affected versionversion=b9aa02ca39a49740926c2c450a1505a4a0f8954a <07f8aaffee705e552c1f723ac8bf7eb137ad59c2
  3. Affected versionversion=b9aa02ca39a49740926c2c450a1505a4a0f8954a <11483d80267db97fbe49f2df66385434256cc3b0
  4. Affected versionversion=b9aa02ca39a49740926c2c450a1505a4a0f8954a <3f7b3728dd9011c915cbeaea77274ebe8366550d
  5. Affected versionversion=b9aa02ca39a49740926c2c450a1505a4a0f8954a <7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261
  6. Affected versionversion=b9aa02ca39a49740926c2c450a1505a4a0f8954a <bc7a0f721123ea260a42f1ded06dab844ba49434

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=b9aa02ca39a49740926c2c450a1505a4a0f8954a <07f8aaffee705e552c1f723ac8bf7eb137ad59c2; version=b9aa02ca39a49740926c2c450a1505a4a0f8954a <11483d80267db97fbe49f2df66385434256cc3b0; version=b9aa02ca39a49740926c2c450a1505a4a0f8954a <3f7b3728dd9011c915cbeaea77274ebe8366550d; version=b9aa02ca39a49740926c2c450a1505a4a0f8954a <7aa7d4bf9d3fa9a6a47b640ad103ab433b7ff261; version=b9aa02ca39a49740926c2c450a1505a4a0f8954a <bc7a0f721123ea260a42f1ded06dab844ba49434

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0OracleCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-825Expired Pointer Dereference
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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