# CVE-2026-34489: Intel Hyperscan untrusted pointer dereference DoS

Source: https://junglewise.ai/threats/cve-2026-34489-untrusted-pointer-dereference-for-some-hyperscan-before-version  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-34489 · Severity: info · Published 2026-11-10

Hyperscan is a pattern matching library used in applications to detect threats and anomalies in network traffic and data. A flaw in versions before v5.4.2.1 allows an unprivileged attacker to crash applications using the library, disrupting service availability. An attacker with local access and no special privileges can trigger this denial-of-service condition.

Technologies: [Intel Hyperscan](https://junglewise.ai/threats/technologies/hyperscan). Vendors: [Intel](https://junglewise.ai/threats/vendors/intel).

## Quick answers

**Is CVE-2026-34489 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34489 being exploited in the wild.

**How severe is CVE-2026-34489?** 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-2026-34489?** 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-2026-34489 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-34489?** 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 untrusted pointer dereference in the Hyperscan pattern matching engine within Ring 3 user applications allows a denial of service via local attack vector. The vulnerability requires low attack complexity and no user interaction, affecting availability with high impact. The flaw is resolved in Hyperscan version v5.4.2.1.

## Affected products

- Intel Hyperscan before v5.4.2.1

## Timeline

- 2026-11-10: disclosed

## References

- [https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01511.html](https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01511.html)

## Related threats

- [Intel Hyperscan heap-based buffer overflow denial of service](https://junglewise.ai/threats/cve-2026-63540-heap-based-buffer-overflow-for-some-hyperscan-before-version-v5-4)
- [Intel Hyperscan out-of-bounds write denial of service](https://junglewise.ai/threats/cve-2026-40694-out-of-bounds-write-for-some-hyperscan-before-version-v5-4-2-1)
- [Intel Hyperscan out-of-bounds read in user applications](https://junglewise.ai/threats/cve-2026-40424-out-of-bounds-read-for-some-hyperscan-before-version-v5-4-2-1)
- [Intel Hyperscan multiple memory safety vulnerabilities](https://junglewise.ai/threats/cve-2026-40216-out-of-bounds-read-for-some-hyperscan-before-version-v5-4-2-1)
- [Intel Hyperscan heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-34017-heap-based-buffer-overflow-for-some-hyperscan-before-version-v5-4)