Kernel crash via unregistered UCSI port resume
Published Mar 27, 2025 · Updated May 23, 2026
Null pointer dereference in the UCSI driver in Linux 6.0.15 through 6.0.19 and 6.1.1 through 6.1.10 allows local users to crash the kernel. During system resume, the UCSI resume path attempts to process connector ports before asynchronous port registration has created them, causing null port state to be dereferenced. Exploitation requires local access and a system using the affected UCSI USB Type-C resume path; the reported consequence is interruption of the host.
Summary
What happened
Null pointer dereference in the UCSI driver in Linux 6.0.15 through 6.0.19 and 6.1.1 through 6.1.10 allows local users to crash the kernel. During system resume, the UCSI resume path attempts to process connector ports before asynchronous port registration has created them, causing null port state to be dereferenced. Exploitation requires local access and a system using the affected UCSI USB Type-C resume path; the reported consequence is interruption of the host.
The record
- CVE
- CVE-2023-52938
- Published
- Mar 27, 2025
- Updated
- May 23, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-476, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 27, 2025CVE publishedPublication date reported by the CVE source.
- May 23, 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.
- Affected versionversion=160416b397c362e37b590040a089604dd1f37de1
- Affected versionversion=6.0.15 <6.1
- Affected versionversion=6.1.1 <6.1.11
- Affected versionversion=9222912924fcf56e2d166a503eddbdb5ffd2005f <fdd11d7136fd070b3a74d6d8799d9eac28a57fc5
- Affected versionversion=e0dced9c7d4763fd97c86a13902d135f03cc42eb <f82060da749c611ed427523b6d1605d87338aac1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
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
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo