First published 9/27/2026, 6:24:15 AM · Last updated 9/27/2026, 6:24:15 AM

CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability

A flaw in the Linux Kernel TLS receive path can allow a zero-length record to bypass intended recvmsg() handling, potentially causing subsequent TLS records to be processed using incorrect zero-copy and queuing assumptions. The advisory instructs users to discontinue use of impacted EoL/EoS products or transition to supported versions and to apply vendor mitigations per CISA guidance.

Categories: technology

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 6/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 3/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 4/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 4/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 2/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 6/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

The vulnerability can cause incorrect TLS record processing and requires prompt mitigation per vendor and CISA guidance.

Location

Sources

CVE-2025-39682: Linux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability

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