System hang via unbounded MST interrupt servicing
Published Aug 10, 2026 · Updated Aug 10, 2026
Denial of service in Linux 5.8 and later allows physically proximate attackers to hang systems through a DisplayPort MST sink. The intel_dp_check_mst_status() function services new sink interrupts without bounding the ESI retry loop, so a sink that keeps asserting interrupts prevents the handler from completing. Reachability requires an i915-driven DisplayPort MST connection to a malicious or faulty sink, and the documented consequence is system unresponsiveness.
Summary
What happened
Denial of service in Linux 5.8 and later allows physically proximate attackers to hang systems through a DisplayPort MST sink. The intel_dp_check_mst_status() function services new sink interrupts without bounding the ESI retry loop, so a sink that keeps asserting interrupts prevents the handler from completing. Reachability requires an i915-driven DisplayPort MST connection to a malicious or faulty sink, and the documented consequence is system unresponsiveness.
The record
- CVE
- CVE-2026-68241
- Published
- Aug 10, 2026
- Updated
- Aug 10, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-835, T1499.004
- Attack vector
- physical
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 10, 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=3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 <005771c18c5b2c98cb4e7517661aea460990fd3f
- Affected versionversion=3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 <9061fbf2230b6fcef042a6f637beae57c2fc93a5
- Affected versionversion=3c0ec2c2d5948356a22c8f1c08a8087b12a303e7 <e3bcd3bf7eeca9570b9fa0b2f8a602c7bcc6b0d0
- Affected versionversion=5.8
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