# CVE-2026-28730: Intel Hyperscan null pointer dereference denial of service

Source: https://junglewise.ai/threats/cve-2026-28730-null-pointer-dereference-for-some-hyperscan-before-version-v5-4-2  
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-2026-28730 · Severity: info · Published 2026-11-10

Intel Hyperscan is a regular expression matching engine used in software applications. A null pointer dereference vulnerability allows an unprivileged local attacker to crash applications using Hyperscan, causing a denial of service without requiring authentication or user interaction.

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

## Quick answers

**Is CVE-2026-28730 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-28730 being exploited in the wild.

**How severe is CVE-2026-28730?** 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-2026-28730?** 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-2026-28730 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-28730?** 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

Hyperscan before version v5.4.2.1 contains a null pointer dereference flaw in Ring 3 user applications that can be triggered by an unprivileged, unauthenticated attacker via local access with low attack complexity and no special preconditions. The vulnerability impacts system availability (high impact) and allows denial of service through application crashes.

## 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 untrusted pointer dereference DoS](https://junglewise.ai/threats/cve-2026-34489-untrusted-pointer-dereference-for-some-hyperscan-before-version)