CVE-2026-33094: Intel Hyperscan out-of-bounds write denial of service

CVE-2026-33094 · Severity: info · Published 2026-11-10

Intel Hyperscan is a high-performance regular expression matching library used in security and networking applications. An out-of-bounds write vulnerability in versions before v5.4.2.1 allows unprivileged local attackers to crash the application or potentially corrupt memory, causing denial of service. The vulnerability requires local access but no authentication or user interaction.

Technologies: Intel Hyperscan. Vendors: Intel.

Quick answers

Is CVE-2026-33094 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33094 being exploited in the wild.
How severe is CVE-2026-33094?
Informational severity, published 10 November 2026.
Which products and versions are affected?
Intel Hyperscan before v5.4.2.1.
Is there a fix for CVE-2026-33094?
Yes: fixed in v5.4.2.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-33094 attacked?
It is attacked with local access, in a software library.
Am I affected by CVE-2026-33094?
Check whether you run Intel Hyperscan at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: v5.4.2.1

Technical details

An out-of-bounds write in Hyperscan before v5.4.2.1 can be triggered by unprivileged, unauthenticated local attackers with low complexity. The attack occurs in Ring 3 user applications via local access with attack requirements present. This memory corruption vulnerability can cause application crash and memory integrity violations.

Affected products

  • Intel Hyperscan before v5.4.2.1

Timeline

  • 2026-11-10: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.