Trace suppression via unreported ring-buffer exhaustion
Published Mar 12, 2026 · Updated Mar 12, 2026
Denial of service in Inspektor Gadget before 0.50.1 allows local users to suppress traced events by flooding a gadget's ring buffer. On Linux 5.8 and later, the 256 KB buffer silently discards events when gadget_reserve_buf cannot reserve space, while tracer.go reports the lost count as zero. A compromised container or process that can generate arbitrary events can hide its own activity and force unrelated containers' events out of the trace stream.
Summary
What happened
Denial of service in Inspektor Gadget before 0.50.1 allows local users to suppress traced events by flooding a gadget's ring buffer. On Linux 5.8 and later, the 256 KB buffer silently discards events when gadget_reserve_buf cannot reserve space, while tracer.go reports the lost count as zero. A compromised container or process that can generate arbitrary events can hide its own activity and force unrelated containers' events out of the trace stream.
The record
- CVE
- CVE-2026-31890
- Published
- Mar 12, 2026
- Updated
- Mar 12, 2026
- Vendor
- Inspektor Gadget
- Product
- Inspektor Gadget
- Classifications
- CWE-223, CWE-770, T1562
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 12, 2026CVE publishedPublication date reported by the CVE source.
- Mar 12, 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.
- Affected versionversion=< 0.50.1
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
- Event-flooding run.sh and flood.c proof of conceptproof of concept · demonstrated
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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