# CVE-2026-40216: Intel Hyperscan multiple memory safety vulnerabilities

Source: https://junglewise.ai/threats/cve-2026-40216-out-of-bounds-read-for-some-hyperscan-before-version-v5-4-2-1  
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-2026-40216 · Severity: info · Published 2026-11-10

Intel Hyperscan is a pattern matching library used in applications for regex and pattern detection. Multiple memory safety flaws—including out-of-bounds reads and writes, buffer overflows, and null pointer dereferences—allow unprivileged local attackers to cause denial of service. An attacker with local access can crash applications using Hyperscan, disrupting service availability.

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

## Quick answers

**Is CVE-2026-40216 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-40216 being exploited in the wild.

**How severe is CVE-2026-40216?** 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-2026-40216?** 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-2026-40216 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-40216?** 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

Seven distinct vulnerabilities affect Hyperscan before v5.4.2.1 in user-mode applications, including untrusted pointer dereference (CVE-2026-34489), out-of-bounds write (CVE-2026-33094, CVE-2026-40694), null pointer dereference (CVE-2028-28730), heap-based buffer overflow (CVE-2026-34017, CVE-2026-63540), and out-of-bounds read (CVE-2026-40424, CVE-2026-40216). Attack vectors are local with low complexity; most require no authentication and no user interaction. Exploitation results in availability impact (high on most), with some variants affecting integrity or confidentiality (low).

## 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 untrusted pointer dereference DoS](https://junglewise.ai/threats/cve-2026-34489-untrusted-pointer-dereference-for-some-hyperscan-before-version)
- [Intel Hyperscan heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-34017-heap-based-buffer-overflow-for-some-hyperscan-before-version-v5-4)