First published 9/27/2026, 5:55:15 AM · Last updated 9/27/2026, 5:55:15 AM

CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability

An out-of-bounds write in the Linux kernel’s ebtables SNAT target can allow an ARP sender hardware address rewrite to corrupt a nonlinear socket-buffer fragment backed by a splice-imported file page. The source warns impacted products may be end-of-life or end-of-service and advises discontinuation or transition and applying 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: 6/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 5/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 5/10The 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: 7/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Why it matters

Users and administrators are instructed to apply mitigations and follow CISA BOD 26-04 guidance or discontinue use if mitigations are unavailable.

Location

Sources

CVE-2026-53266: Linux Kernel Out-of-Bounds Write Vulnerability

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